What to do if your car has flood damage

Overview: If your car is flooded, don’t start it. Floodwater can damage the engine and electrical systems. First, prioritize safety and arrange towing or professional recovery if the area is unsafe. After the water recedes, document the damage, have a mechanic inspect the vehicle (including fluids and electrical components) and dry the interior to reduce corrosion and mold risk. Then review repair options versus total loss with your insurance company and discuss claim options.

If you’re dealing with a flooded car, knowing what steps to take can help reduce flood damage and long-term issues, and make the insurance process smoother.

What to do immediately after your car floods

• Keep people safe. Don’t wade into floodwater that’s deep or moving quickly. If it’s unsafe to approach the vehicle, wait for help.
• Avoid starting the car. Starting could cause serious damage if water is inside the engine or cylinders.
• Move the car only when it’s safe. Towing or professional recovery may be needed. Don’t drive it to “test it.”
• If it was saltwater, treat it as an urgent electrical/corrosion issue. Don’t start the vehicle. Arrange for a professional inspection that includes wiring, sensors, modules and other electrical components as soon as the area is safe. 

Use this quick guide to help you decide your next step after a flood incident:

Flood damage checklist

Consider using this flood damage checklist after the floodwater has receded:

• Act quickly. Flood damage can lead to corrosion and odor problems as time passes, especially after saltwater flooding.
• Check for waterlines/watermarks. Look for water in areas you wouldn’t normally expect, including the cabin, trunk, under seats and around the engine bay. If your car’s dashboard or interior shows a “waterline,” note it. Also check headlights and taillights for signs of moisture intrusion.
• Document everything for insurance. Take clear photos and videos of the vehicle (front, back and sides), the interior carpets and seats, the engine bay and any visible waterlines. If possible, use timestamped photos and keep an itemized list of what appears affected.
• Do not start the engine or accessories. Even if the car seems dry, avoid trying to “test it.” Start-up can cause damage if water contaminated the engine, fuel or electrical systems.
• Inspect fluids and the engine areas (via a professional when possible). Floodwater can contaminate fluids and affect components tied to flooded engine risk.
• Remove standing water and dry thoroughly. When flooding enters the passenger compartment, carpet and padding may need to be pulled so the interior can dry fully. If you cannot remove these materials safely, consider taking the car to a shop immediately so it can be dried properly. The sooner this is done, the better chance of avoiding mold and mildew.
• Check electrical components. Floodwater can damage sensors, modules, wiring and electronics. Ask a mechanic to inspect for corrosion, shorts and moisture-related issues.
• Have the fuel system checked. A mechanic may need to check for water in the fuel tank and/or fuel line before any attempt to run the vehicle.
• Address odors and cleanup needs. Persistent odor or hidden moisture can happen after flooding. Consider a professional cleaning/detailing service to help prevent longer-term mold growth and corrosion and to manage odors.

When to contact your insurer and when to file a claim 

In many cases, it’s best to contact your agent as soon as it’s safe to do so, even before repairs begin, so your claim can be set up and guidance provided. Coverage and next steps can vary by policy and location, and some policies exclude certain flood-related damage, so review your policy and confirm details with your agent.

After a mechanic’s inspection, your insurer typically compares repair costs to replacement value. If your vehicle is considered a total loss, you may need to decide how to proceed with a claim. Keep copies of all communications and claim documents.

Frequently asked questions

1) How do I know if my car has flood damage?

Look for water in the cabin, moisture where it shouldn’t be, signs of corrosion and any issues that require a mechanic’s inspection, especially around the engine bay and electrical components.

2) Can floodwater cause electrical problems later?

Yes. Flooded car electronics can corrode or fail later, even if the car appears to be dry.

3) Does saltwater flood damage differ from freshwater?

Yes. Saltwater generally increases corrosion risk. It can cause electrical components to corrode and fail later, sometimes after the vehicle appears to be dry. Prioritize thorough drying and careful electrical inspection and avoid starting the vehicle until a professional has checked it.

4) What should I do for mold prevention?

Dry the interior quickly and thoroughly. Moisture left behind can increase mold risk, and odors may indicate moisture that’s still trapped.

5) Does auto insurance cover flood damage?

Comprehensive coverage may apply to flood-related damage, but it depends on your policy and location. Check your policy or ask your insurer what flood coverage applies to your specific car.

6) What should I do if the car was running when it entered floodwater?

If it’s safe to do so, shut it off immediately and don’t restart. Water drawn into the engine can cause major damage even if the car seems to run later. Have it inspected before attempting to start again.

7) Can I drive the car after it dries out?

Don’t assume it’s safe just because it looks dry. Water can remain in critical systems (fluids, sensors, wiring). Get a mechanic inspection first, especially before attempting to drive.

8) What photos/videos should I take for an insurance claim?

Take pictures of the odometer, engine bay, interior (including carpets/seats), any visible water lines, damaged areas and the flooded surroundings/water level if possible.

9) Can floodwater affect brakes or warning lights?

Yes. Water intrusion can affect braking systems and trigger dashboard warning lights. If warning lights appear or you suspect brake/ABS issues, don’t test-drive, have the vehicle inspected.

10) What if my car is a hybrid or EV?

Hybrid and EV vehicles include high-voltage systems. If the vehicle may be flooded or damaged, it’s important to avoid trying to access areas you aren’t trained to handle. Follow the manufacturer’s guidance and have the vehicle inspected by a qualified technician before attempting to operate it again.

You can get an auto insurance quote now, or give us a few details and a State Farm agent will reach out to you.