Flooded buildings are not simply wet buildings. When water enters a structure, it can interact with electrical systems in ways that are not visible, not predictable, and not resolved by the absence of utility power.
Firefighters, EMS personnel, law enforcement officers, rescue teams, and incident commanders operating in or around flooded structures must treat electrical hazards as a persistent, active concern — not a secondary consideration to be addressed after other priorities are resolved.
This article addresses how electrical hazards develop in flooded buildings, why common assumptions about electrical safety are unreliable in flood conditions, how to approach scene size-up and access decisions, and when qualified electrical personnel are required before operations can safely proceed.
Why Flooded Buildings Create Electrical Hazards
Electricity and Water Can Interact in Ways That Are Not Visible
Electrical equipment that is submerged, wet, or in contact with floodwater may remain energized. Floodwater can contain dissolved minerals, salts, sewage, chemicals, and other contaminants that may create conductive paths between energized equipment and the surrounding water, surfaces, and objects.
This does not mean all floodwater has the same electrical properties or that every flooded area presents an identical hazard. It means that floodwater and wet surfaces near electrical equipment should be treated as potential electrical hazards — not assumed to be safe — until the electrical condition of the area has been appropriately established and controlled by qualified personnel.
OSHA identifies standing water near electrical circuits and equipment as a serious hazard and warns against entering flooded areas or touching electrical equipment where wet conditions create potential electrical exposure.
Electrical Hazards May Be Hidden
One of the most significant dangers in a flooded building is that the hazards are not visible. Floodwater may conceal:
- Electrical receptacles and outlets
- Extension cords and power strips
- Junction boxes and wiring connections
- Appliances and equipment
- Electrical panels and subpanels
- Service equipment and meter bases
- Industrial machinery and controls
- Damaged conductors and wiring
- Underground electrical infrastructure
A responder cannot determine by looking at standing water whether submerged equipment beneath it is energized. The absence of visible sparking, arcing, or other electrical activity is not evidence that the area is electrically safe.
Electrical Equipment Can Be Damaged Without Appearing Damaged
Floodwater can damage electrical insulation, connections, components, and equipment in ways that are not externally visible. FEMA documents the vulnerability of generators, transfer switches, panelboards, feeders, controls, transformers, and other electrical distribution equipment to floodwater intrusion.
Flood-damaged electrical equipment should not be assumed safe to approach, operate, or re-energize simply because it has dried or because water has receded. Evaluation and restoration of flood-damaged electrical systems is work for qualified electrical personnel — not a first-responder function.
Why Loss of Power Does Not Establish Electrical Safety
This is one of the most dangerous assumptions at flooded-building incidents. The absence of utility power — whether from a neighborhood outage, a tripped breaker, or apparent loss of service — does not mean a flooded building is electrically safe.
Generators and Backfeed
Generators are among the most significant sources of unexpected electrical energy in flood conditions. NIOSH and FEMA document generator backfeed hazards extensively.
When a generator is improperly interconnected with building wiring — without an appropriate transfer switch or isolation device — it can energize the building’s electrical system even when normal utility service is unavailable. That energized system can then backfeed through the utility meter and into the utility distribution conductors serving the building and neighboring structures.
This means:
- A building that appears to have no utility power may have energized wiring
- Utility conductors that appear to be de-energized may be energized by a generator inside a building
- Neighboring structures connected to the same distribution circuit may have energized conductors
- Utility workers and responders working on apparently de-energized conductors may be exposed to generator backfeed
NIOSH specifically identifies generator backfeed as a hazard during flood and storm response. FEMA documents the widespread use of generators during extended outages and the associated backfeed risk.
Permanently Installed Emergency Power Systems
Many commercial, industrial, institutional, and residential buildings contain permanently installed emergency or standby power systems. These may include:
- Permanently installed generators with automatic transfer equipment
- Uninterruptible power supply (UPS) systems
- Battery-based emergency lighting and power systems
- Transfer switches and bypass equipment
These systems are specifically designed to operate when normal utility power is unavailable. A building that has lost utility power may have active emergency power systems supplying portions of its electrical infrastructure.
Solar Photovoltaic Systems
Solar PV systems can generate electrical energy whenever sufficient light is present — including during and after flood events. Disconnecting utility service or operating a building’s main electrical disconnect does not necessarily eliminate voltage within the solar system’s DC conductors, inverters, combiner equipment, or associated wiring.
Roof-mounted solar arrays may remain energized even when the building below is flooded and utility power is disconnected. Responders should identify solar installations during size-up and treat associated equipment as potentially energized.
Battery Energy Storage Systems
Battery Energy Storage Systems (BESS) store electrical energy independently of the utility grid. A flooded building containing a BESS may have energized electrical equipment even when all external power sources have been disconnected or are unavailable.
Flood-damaged battery systems also introduce additional hazards including potential for thermal runaway, toxic gas release, and fire — independent of the electrical shock hazard.
Other Distributed Energy Resources
Buildings may contain other sources of stored or generated electrical energy including fuel cells, microturbines, combined heat and power systems, and other distributed-energy equipment. The presence of any of these systems means that disconnecting one energy source does not establish that all electrical energy in the building has been eliminated.
The fundamental principle: treat a flooded building as potentially energized until qualified electrical personnel have established and confirmed that the electrical hazard has been appropriately controlled.
Floodwater and Conductive-Path Hazards
Floodwater is not a uniform substance. Its electrical properties depend on what it contains — dissolved minerals, salts, sewage, industrial chemicals, agricultural runoff, and other contaminants all affect how it may interact with electrical energy.
Responders should not attempt to assess the electrical properties of floodwater by observation. The appearance, color, or clarity of floodwater does not indicate whether it may create conductive paths near energized equipment.
The appropriate operational principle is straightforward: treat floodwater and wet surfaces in the vicinity of electrical equipment as potential electrical hazards. Do not enter flooded areas or contact standing water near electrical systems until the electrical condition has been appropriately established and controlled.
This applies to:
- Standing water on floors, in basements, and in utility areas
- Water in contact with electrical panels, meters, and service equipment
- Water surrounding submerged appliances, machinery, or equipment
- Wet surfaces adjacent to damaged conductors or wiring
- Outdoor floodwater near utility infrastructure, downed conductors, or energized objects
For a detailed explanation of how electrical energy can travel through the ground and create step and touch potential hazards in wet conditions, see Understanding Step and Touch Potential.
Scene Size-Up: Electrical Considerations for Flooded Buildings
Electrical hazard assessment should begin before responders enter a flooded structure. The following questions should be part of size-up at every flooded-building incident.
Size-Up Questions
Utility service:
- Is utility power confirmed off, or only apparently off?
- Has the serving utility been contacted and confirmed de-energization of the specific service?
- Is restoration activity underway in the area that could re-energize circuits?
Alternate energy sources:
- Is there a generator visible or audible at or near the structure?
- Does the building have a permanently installed emergency power system?
- Are there solar panels on the roof or adjacent structures?
- Are there battery storage systems, UPS equipment, or other distributed-energy resources?
Electrical equipment:
- Where is the electrical service entrance and main panel?
- Are panels, meters, or service equipment submerged or in contact with floodwater?
- Are there visible downed conductors near or contacting the structure?
- Are there damaged conductors, exposed wiring, or displaced electrical equipment visible?
Structural and access conditions:
- Are there flooded below-grade areas (basements, utility rooms, mechanical spaces)?
- Is structural integrity compromised in areas where electrical equipment is located?
- Is visibility limited by debris, turbid water, or poor lighting?
Occupancy and use:
- What is the building’s occupancy type? (Residential, commercial, industrial, institutional)
- Does the occupancy type suggest the presence of specialized electrical systems, high-voltage equipment, or emergency power infrastructure?
These questions do not replace qualified electrical assessment — they help incident commanders make informed decisions about access, responder positioning, and when to involve utility or electrical personnel before operations proceed.
Flooded Basements and Below-Grade Areas
Basements, utility rooms, mechanical spaces, and other below-grade areas present concentrated electrical hazard risks in flood conditions.
These areas commonly contain:
- Electrical panels and subpanels
- Service entrance equipment
- Meters and disconnects
- Permanently installed generators and transfer switches
- UPS systems and battery equipment
- HVAC equipment and controls
- Water heaters and mechanical systems
- Sump pumps and associated wiring
- Industrial machinery and controls in commercial/industrial occupancies
When these areas are flooded, all of this equipment may be submerged. Responders cannot determine by visual inspection whether submerged equipment is energized.
OSHA identifies flooded basements as a specific hazard in damaged and collapsed structures, noting the combination of electrical equipment, water, structural instability, and limited egress.
Do not enter flooded below-grade areas until the electrical condition has been appropriately established and controlled by qualified personnel. The combination of energized equipment, conductive floodwater, limited egress, and structural instability creates conditions where a single electrical contact can be fatal and where rescue of an injured responder may be extremely difficult.
Submerged Electrical Equipment
Submerged electrical equipment — receptacles, panels, appliances, machinery, extension cords, junction boxes, and other components — may be energized even when completely underwater.
Responders should not:
- Reach into floodwater to locate, identify, or operate electrical equipment
- Attempt to determine whether submerged equipment is energized by touching it or the surrounding water
- Remove panel covers or access electrical enclosures in flooded conditions
- Operate switches, breakers, or disconnects on equipment that has been submerged or is in contact with floodwater
These actions are outside the first-responder role and require qualified electrical personnel with appropriate training, equipment, and authority.
If submerged electrical equipment is identified during size-up or operations, communicate its location to incident command and ensure it is included in the electrical hazard assessment conducted by qualified personnel.
Damaged Service Equipment
Electrical service equipment — including meter bases, main panels, service entrance conductors, and disconnects — is frequently located at or near grade level and is vulnerable to flood damage.
Flood-damaged service equipment may:
- Have compromised insulation on service entrance conductors
- Have water intrusion into panel enclosures
- Have damaged or corroded connections and components
- Remain energized from the utility side even when internal components are damaged
- Present arc flash hazards if operated in a damaged condition
Service entrance conductors — the conductors connecting the utility to the building — are utility-owned and remain energized until the utility de-energizes them. A main breaker that has been tripped or is in the off position does not de-energize the service entrance conductors on the utility side of that breaker.
Responders should not operate, remove covers from, or attempt to assess flood-damaged service equipment. This is utility and qualified-electrical-worker territory.
Hidden and Exposed Conductors
Floodwater can displace, damage, and expose electrical conductors in ways that are not predictable from the exterior of a building.
Conductors may be:
- Pulled from conduit or raceways by flood debris
- Damaged by structural movement or collapse
- Exposed by erosion or undermining of foundations
- Displaced from their normal routing by floodwater pressure
- Concealed beneath debris, sediment, or standing water
Exposed conductors in a flooded building may be energized from utility power, generator backfeed, solar systems, battery systems, or other sources. They may not be visible. They may be in contact with structural components, water, or debris that extends the electrical hazard beyond the conductor itself.
If exposed or displaced conductors are identified, treat them as energized, establish a hazard area, and involve qualified electrical personnel before operations in the affected area proceed.
Downed Conductors Near Flooded Structures
Storm and flood events that produce flooded buildings frequently also produce downed utility conductors. Downed conductors near a flooded structure introduce additional hazards that interact with the building’s electrical condition.
A downed conductor in contact with or near a flooded structure may:
- Energize the building’s structural components, metal framing, or conductive infrastructure
- Energize floodwater surrounding or entering the structure
- Energize fences, guardrails, vehicles, or other conductive objects adjacent to the building
- Create step and touch potential hazards in the surrounding ground and water
Floodwater can complicate the recognition of downed conductors — a conductor lying beneath standing water may not be visible. Treat the area around a flooded structure as a potential step and touch potential hazard zone, particularly in storm conditions where conductor damage is likely.
For comprehensive guidance on downed conductor incidents, see Downed Power Line Safety for First Responders. For guidance on vehicles in contact with conductors in flood conditions, see Vehicle Contact With Power Lines: First Responder Safety.
Conductive Structural Components
Metal structural components — steel framing, metal decking, reinforcing bar, metal ductwork, piping, and similar elements — can become energized if they contact an energized conductor or energized equipment.
In a flooded building, these components may be in contact with floodwater, creating a situation where the electrical hazard extends through the water to areas that appear to be well clear of any visible electrical equipment.
Responders should not assume that metal structural components in a flooded building are safe to touch. If the electrical condition of the building has not been established and controlled by qualified personnel, treat conductive structural components as potentially energized.
Generators and Backfeed: A Detailed Look
Generator backfeed is one of the most significant and least visible electrical hazards in flood response. It warrants specific attention because it directly contradicts the common assumption that a neighborhood outage means circuits are de-energized.
How Backfeed Occurs
When a portable or permanently installed generator is connected to building wiring without an appropriate transfer switch or isolation device, the generator can energize the building’s electrical system. That energized system can then backfeed through the utility meter and into the utility distribution conductors serving the building and neighboring structures.
This means:
- A building that appears to have no utility power may have energized wiring
- Utility conductors that appear to be de-energized may be energized by a generator inside a building
- Neighboring structures connected to the same distribution circuit may have energized conductors
- Utility workers and responders working on apparently de-energized conductors may be exposed to generator backfeed
Recognizing Generator Presence
Indicators that a generator may be present and operating include:
- Audible generator noise from inside or adjacent to the structure
- Visible generator equipment at or near the building
- Extension cords running from the building to an exterior generator
- Fuel containers near the building
- Lights or appliances operating inside a building that appears to have no utility power
None of these indicators are required. A generator may be present and operating without any of these being visible or audible from outside.
Operational Principle
Do not assume that a building is electrically safe because utility power appears to be unavailable. Confirm with the serving utility that the specific service has been de-energized and that backfeed conditions have been addressed before treating the building’s electrical system as de-energized.
For additional context on backfeed hazards during storm and restoration operations, see Storm Restoration Electrical Safety.
UPS Systems
Uninterruptible power supply systems are designed to provide continuous electrical power during utility outages. They are common in:
- Hospitals and healthcare facilities
- Data centers and communications facilities
- Commercial and office buildings
- Industrial control systems
- Emergency communications infrastructure
A UPS system may supply energized circuits in a flooded building even when all external power sources — utility, generator, and solar — have been disconnected or are unavailable. UPS systems can store significant amounts of electrical energy in battery banks that may remain charged for extended periods.
Responders should identify UPS systems during size-up, particularly in commercial, institutional, and industrial occupancies. Treat circuits supplied by UPS systems as potentially energized until qualified electrical personnel have confirmed the system has been safely isolated.
Solar PV and Alternate Energy Sources
Solar photovoltaic systems require specific attention in flooded-building incidents because they can generate electrical energy independently of the utility grid and independently of any action taken to disconnect utility power.
What Disconnecting Utility Power Does Not Do
Operating a building’s main electrical disconnect or utility service disconnect does not necessarily:
- De-energize DC conductors between solar panels and inverters
- De-energize combiner boxes or string wiring
- Prevent the solar array from generating voltage when exposed to light
- Eliminate voltage in portions of the system upstream of the disconnect
Roof-mounted solar arrays may remain energized during and after a flood event. Floodwater entering the building does not de-energize the solar system above.
Rapid Shutdown Systems
Some solar installations include rapid shutdown systems that reduce voltage in conductors within the array boundary when activated. However, rapid shutdown systems vary in design, may not be present in older installations, may not function correctly in flood-damaged conditions, and do not necessarily eliminate all voltage in the system.
Responders should not assume a solar system is de-energized based on the presence of a rapid shutdown device or the operation of any disconnect.
Operational Principle
Identify solar installations during size-up. Treat solar system components — panels, conductors, inverters, combiner equipment, and associated wiring — as potentially energized. Involve qualified electrical personnel in the assessment of solar systems before operations in affected areas proceed.
Structural Instability and Electrical Hazards Together
Flooded buildings frequently present structural hazards alongside electrical hazards. OSHA identifies this combination specifically — flooded basements and damaged structures can simultaneously contain energized wiring, standing water, structural instability, limited egress, debris, and hazardous materials.
The interaction of these hazards is important for incident commanders to recognize:
- Structural movement or collapse can damage electrical equipment and expose conductors
- Debris can conceal both structural hazards and electrical equipment
- Limited egress in flooded below-grade areas reduces the ability to rescue an injured responder
- Electrical contact in a flooded, structurally compromised area may result in a situation where rescue is extremely difficult or impossible
Electrical assessment must remain part of the overall incident risk assessment — not treated as a separate concern to be addressed after structural and access decisions have been made.
Poor Visibility and Debris
Flood conditions frequently reduce visibility inside structures through turbid water, debris, sediment, smoke, and poor lighting. These conditions directly affect electrical hazard recognition.
Responders operating in low-visibility flooded environments should recognize that:
- Submerged electrical equipment may not be visible
- Downed or displaced conductors may be concealed beneath water or debris
- The boundaries of flooded areas may not be clearly defined
- Electrical equipment may have been displaced from its normal location by floodwater
- Debris in contact with energized equipment may extend the electrical hazard
Do not assume that the absence of visible electrical equipment means the area is free of electrical hazards. In low-visibility conditions, the inability to see electrical equipment is not evidence of its absence.
Scene Control Considerations
Effective scene control at flooded-building incidents requires managing access to areas where electrical hazards may be present — including areas that may not appear immediately dangerous.
Establishing the Hazard Area
The hazard area at a flooded-building incident should account for:
- The flooded structure itself
- Adjacent areas where floodwater may have spread
- Areas near downed conductors or utility infrastructure
- Vehicles, fences, guardrails, and other conductive objects that may be energized
- Outdoor areas where step and touch potential hazards may exist
There is no universal exclusion distance that applies to all flooded-building electrical incidents. Hazard area boundaries should be established conservatively and adjusted as the electrical condition of the scene is established by qualified personnel.
Preventing Unauthorized Access
Bystanders, building occupants, and unauthorized personnel should be prevented from entering flooded structures until the electrical condition has been appropriately established and controlled. This includes:
- Occupants attempting to retrieve belongings
- Property owners assessing damage
- Contractors or cleanup personnel arriving before electrical assessment is complete
- Media and observers
Communicate clearly that the area is an electrical hazard zone and that access requires confirmation that the electrical condition has been controlled.
Responder Positioning
Responders managing the scene should position themselves outside areas where electrical hazards may be present. Do not position personnel in flooded areas, in contact with standing water near electrical equipment, or in below-grade areas where electrical hazards have not been controlled.
Utility Coordination
Utility coordination is fundamental to resolving electrical hazards in flooded buildings. First responders establish scene control and protect personnel — utility personnel establish and control the electrical condition of utility-owned infrastructure.
What Utility Personnel Can Do
Utility personnel have the training, equipment, authority, and system knowledge to:
- Confirm whether utility service to the building is energized
- De-energize and appropriately control the utility service
- Identify downed conductors and assess their electrical condition
- Advise on backfeed conditions and restoration activity
- Coordinate with incident command on safe operating areas
Contacting the Utility
Contact the serving utility as early as possible in a flooded-building incident. Provide:
- The specific address and location
- The nature of the incident — flooded structure, possible electrical hazard
- Whether there are occupants or victims inside
- Whether downed conductors are present or suspected
- Whether a generator or other alternate power source is present or suspected
Confirm that the utility has identified the specific service — not just acknowledged the call. Maintain contact throughout the incident, particularly during extended operations where restoration activity may change circuit status.
Re-Energization and Restoration Activity
During large-scale flood events, utility restoration operations may be underway across wide areas simultaneously. A circuit that was de-energized to address one incident may be re-energized as part of a broader restoration sequence.
Incident commanders should maintain active communication with utility representatives and reassess electrical safety whenever utility operations change. Do not assume that a circuit that was de-energized earlier in the incident remains de-energized.
When Qualified Electrical Personnel Are Required
The following situations require qualified electrical personnel — not first-responder action:
- Assessing whether submerged or flood-damaged electrical equipment is energized
- Operating, disconnecting, or isolating flood-damaged electrical equipment
- Evaluating the condition of flood-damaged service equipment, panels, or wiring
- Assessing solar PV systems, battery systems, UPS systems, or emergency power equipment
- Determining whether generator backfeed conditions exist
- Evaluating whether flood-damaged electrical equipment is safe to re-energize
- Restoring electrical service to a flood-damaged building
The first-responder role at flooded-building incidents is hazard recognition, scene control, access management, occupant communication, and utility coordination — not electrical work.
For context on the appropriate use of insulated tools and the boundary between first-responder operations and qualified electrical work, see Insulated Tools for First Responders.
Flood-Damaged Electrical Equipment and Re-Energization
A flooded building that has been pumped out and dried is not necessarily electrically safe. FEMA documents the vulnerability of electrical equipment to flood damage and the need for qualified assessment before flood-damaged systems are returned to service.
Flood-damaged electrical equipment may have:
- Compromised insulation that is not externally visible
- Corroded connections and components
- Contaminated insulating materials
- Damaged protective devices that may not operate correctly
- Moisture trapped within enclosures that has not fully dried
Re-energizing flood-damaged electrical equipment without qualified inspection and restoration can result in fires, equipment failures, and electrical hazards to building occupants.
First responders should not make determinations about whether flood-damaged electrical equipment is safe to re-energize. This determination belongs to qualified electrical personnel — licensed electricians, electrical inspectors, and utility personnel — following appropriate inspection and restoration procedures.
This distinction is important for incident commanders managing the transition from emergency response to recovery operations. The end of the emergency response phase does not mean the building’s electrical systems are safe for occupancy or use.
Incident Command Considerations
Incident commanders at flooded-building incidents are responsible for integrating electrical hazard assessment into overall scene safety management.
Key command priorities:
- Include electrical hazard assessment in initial size-up — do not defer it
- Assign specific responsibility for utility coordination — do not allow it to be assumed
- Confirm utility contact has been made and the specific service has been identified
- Identify alternate energy sources during size-up — generators, solar, UPS, battery systems
- Prevent personnel from entering flooded areas until electrical conditions are established
- Maintain active communication with the utility throughout the incident
- Reassess electrical safety whenever utility operations, structural conditions, or scene conditions change
- Do not release the scene for recovery operations until qualified electrical personnel have confirmed the electrical condition has been appropriately controlled
- Communicate electrical hazard status clearly to all operating units, including arriving mutual aid
At multi-agency and extended operations:
Ensure all arriving units are briefed on the electrical hazard status and the established hazard area. During extended flood-response operations, reassess electrical conditions regularly — restoration activity, generator use, and changing structural conditions can alter the electrical hazard picture.
Dangerous Assumptions
| Assumption | Why It Is Dangerous |
|---|---|
| “The power is out in the neighborhood — the building is safe.” | Generator backfeed, solar systems, UPS systems, and battery systems can energize building wiring independently of utility power. |
| “The main breaker is off — the building is safe.” | Service entrance conductors remain energized from the utility side of the main breaker. Alternate energy sources may supply other circuits. |
| “The water doesn’t look dangerous.” | Floodwater may contain contaminants that affect its electrical properties. Submerged equipment may be energized. Appearance does not indicate electrical safety. |
| “There’s no sparking or arcing — it must be de-energized.” | Energized equipment in floodwater may show no visible electrical activity. |
| “The building dried out — the electrical system is safe now.” | Flood damage to electrical equipment may not be externally visible. Compromised insulation, corroded connections, and damaged components require qualified inspection before re-energization. |
| “We can check the panel to see if it’s energized.” | Operating or accessing flood-damaged panels is outside the first-responder role and requires qualified electrical personnel. |
| “The generator is off — there’s no backfeed risk.” | Other generators, solar systems, UPS systems, or battery systems may still be supplying energy. |
| “That’s just a residential building — it won’t have emergency power.” | Residential buildings increasingly contain solar PV, battery storage, UPS systems, and portable generators. |
| “The utility said they cut power — we’re safe to enter.” | Confirm the utility has de-energized the specific service. Alternate energy sources inside the building are not controlled by utility action. |
| “I can see the floor — it’s shallow enough to be safe.” | Submerged electrical equipment may be energized regardless of water depth. |
Summary: Operational Principles
- Treat flooded buildings as potentially energized until qualified electrical personnel have established and confirmed the electrical condition has been appropriately controlled.
- Loss of utility power does not establish electrical safety — generators, solar systems, UPS systems, battery systems, and emergency power equipment can supply energy independently.
- Generator backfeed can energize building wiring and utility conductors even when normal utility service is unavailable.
- Floodwater and wet surfaces near electrical equipment may create conductive paths and should be treated as potential electrical hazards.
- Submerged electrical equipment may be energized — responders cannot determine this by visual inspection.
- Flooded below-grade areas present concentrated electrical hazards combined with structural instability and limited egress.
- Downed conductors near flooded structures may energize the building, surrounding water, and adjacent objects.
- Solar PV, battery systems, UPS systems, and emergency power are independent energy sources that utility disconnection does not control.
- Flood-damaged electrical equipment is not safe to re-energize without qualified inspection and restoration.
- Utility coordination is fundamental — contact the utility early and maintain contact throughout.
- Electrical assessment belongs to qualified personnel — first responders recognize hazards, control the scene, and coordinate with qualified personnel.
- No universal safe distance applies to all electrical hazards in flooded buildings.
