After a hurricane, a flooded electric vehicle and a flooded home charger are two different problems that often turn up in the same garage. The car's battery pack is the bigger hazard, because salt water can corrode it and lead to a fire after the water has gone down. The charger and its circuit are a shock and fire hazard of their own until an electrician has checked them. This post covers both, in the order you should deal with them.
If there is smoke, a hissing or popping sound, or fire, stop reading and call 911. Florida's State Fire Marshal tells residents to move to a safe distance first (State Fire Marshal guidance on post-hurricane lithium-ion batteries).
Why salt water is the real danger
Florida learned this after Hurricane Ian. In October 2022 the State Fire Marshal wrote to NHTSA asking for urgent guidance after seeing an EV that had been in storm surge ignite, reignite as crews poured water on it, and reignite again when it was loaded onto a tow truck. The letter noted that much existing guidance on submerged vehicles did not address salt water specifically (State Fire Marshal letter to NHTSA, Oct 7, 2022).
The follow-up research put numbers on it. A teardown study of flood-damaged EVs done for NHTSA estimated that Ian affected about 3,000 to 5,000 EVs, of which about 600 were total losses and about 36 caught fire (NHTSA/SAE teardown analysis of flood-damaged EVs). Most flooded EVs did not burn. But a car that has sat in salt water is not something to park next to the house and hope for the best.
The vehicle: what to do, step by step
- Look and listen from a distance. Smoke, gases, popping or hissing mean move away and call 911.
- Do not charge it. The State Fire Marshal says never to attempt to charge a lithium-ion battery that has been submerged or shows signs of damage (SFM). FPL's storm guidance also says not to plug in or drive a vehicle you suspect is flood-damaged (FPL EV storm safety).
- Do not drive it, even if it seems to work. Let the manufacturer or a qualified technician make that call.
- Get it away from buildings if it is safe to do so. NHTSA advises not to park a flood-damaged lithium-ion vehicle in a garage or within 50 feet of a house, structure, other vehicle or combustibles (NHTSA hurricane and flood-damaged vehicles). If the car is in an attached garage and cannot be moved, the State Fire Marshal suggests keeping the area open and vented.
- Call the manufacturer. The Fire Marshal's guidance is to contact the manufacturer, check the owner's manual, or consult a qualified professional for handling and disposal. Tell your insurer too.
- Tell the tow operator it is a flooded EV. It changes where and how they store it.
Do not try to open, dry out or repair the battery yourself. That is also on the Fire Marshal's list.
The charger and its circuit
Do not touch it while there is water
FPL's guidance is plain: do not touch electrical equipment in floodwater, including an EV charger, because water conducts electricity (FPL). That goes for the charger, the cable lying on the floor, the receptacle and the panel. If water is still present and the power is on, stay out and call an electrician or the utility.
Turn the circuit off only if you can do it dry
If the panel is in a dry location and you can reach it without standing in water, switching off the charger's breaker (or the main) keeps the circuit dead until it is inspected. If the panel itself was under water, leave it alone. Water that has reached a panel is a reason for an electrician, not a reset.
What "weatherproof" does and does not mean
Outdoor chargers carry enclosure ratings for rain and weather. Tesla's Gen 3 Wall Connector, for example, is rated Type 3R / IP54 (Tesla Wall Connector specifications), and several other popular chargers are NEMA Type 4, which adds protection against hose-directed water. Those ratings are for rain and splashing, not for sitting in floodwater. A charger that was submerged, particularly in salt water, should be treated as damaged until the manufacturer's instructions and an inspection say otherwise.
What an electrician checks
- The charger itself, against the manufacturer's instructions for water exposure, and whether it has to be replaced.
- The receptacle on a plug-in setup, such as a NEMA 14-50, which sits low on many garage walls and is easy for water to reach.
- The breaker, including a GFCI breaker, and the panel if water got near it.
- Conduit and boxes, which can hold water and salt residue long after the floor dries.
- The service equipment outside. If the mast, meter enclosure or weatherhead is damaged, the utility may not reconnect until a licensed electrician repairs it; our storm readiness page explains who owns what.
Replacing damaged electrical equipment usually involves a permit. Your city's building department sets the details, and a contractor who pulls the permit also handles the inspection. Our EV charger permits in South Florida guide covers how that works.
If only the garage flooded
Sometimes the car was elsewhere and only the charger and garage took on water. The vehicle rules above do not apply, but the charger rules do: keep the circuit off, have it checked, and do not plug a healthy car into equipment that was under water. It is also the right moment to ask whether the charger belongs somewhere higher. Our guide to flood zone mounting for EV chargers and the post on outdoor chargers in rain and salt air cover height, location and enclosure choices for the rebuild.
Before the next storm
Most of what makes a flood less damaging happens months earlier: chargers and receptacles mounted above likely water, surge protection at the panel, a clearly labeled breaker, and a plan to move the car out of a surge zone. The EV hurricane preparation timeline puts it in order.
Questions homeowners ask
My EV was in fresh rainwater, not storm surge. Is it still a problem?
Salt water is the specific concern in the Fire Marshal's letter, but NHTSA's guidance is that EV and hybrid batteries should not be exposed to standing water at all. Treat any flooded EV as damaged until the manufacturer or a qualified technician checks it.
The car starts and shows no warnings. Can I drive it?
FPL's storm guidance says not to drive or plug in a vehicle you suspect is flood-damaged. A car that seems fine can still have water in places you cannot see. Call the manufacturer first.
Can I dry out the charger and use it again?
Do not power it up to find out. Whether a charger that was under water can be reused is a question for the manufacturer's instructions and an electrician's inspection, and salt water makes replacement much more likely.
How far from the house should a flooded EV be?
NHTSA advises at least 50 feet from a house, structure, other vehicle or combustibles, and not in a garage.
Who do I call first?
For fire, smoke or hissing: 911. For the car: the manufacturer and your insurer. For the charger, panel and service equipment: a licensed electrician.
For the rest of the guide, see the Florida Home EV Charging Guide, and when you are ready to replace or relocate a charger, our EV charger installation page. KRW Electric (EC13012832) inspects and repairs storm-damaged electrical systems across Miami-Dade, Broward and Palm Beach. Tell us what got wet or call (305) 359-7312.
Reviewed by Kyle White, KRW Electric Company LLC — licensed electrical contractor EC13012832.
