Heavy rain has recently brought flash flooding to much of the Northeast, including parts of Connecticut, Massachusetts, New Jersey, New York and Rhode Island. As the area dries out, AAA Northeast is reminding drivers of the impact flooded roads can have on their vehicles. All too often, people underestimate the depth or force of flood waters and find themselves stranded and facing costly auto repairs.
Just six inches of water can cause a car to lose control and stall an engine. And 12 inches of water on a roadway is enough to lift a car and carry it away. Large SUVs and trucks can be moved in just two feet of water.
AAA offers these reminders for drivers:
- An engine can ingest water even driving through what looks like a deep puddle. If this happens, the engine can become hydro-locked and destroyed.
- After driving through deep water, brakes will be wet and might not perform as expected right away. Gently apply the brakes and brake early and gently to dry them off.
- Hot brake rotors can warp when they encounter cold flood water.
- Flood damage to a vehicle is typically covered by comprehensive insurance policies. Call your insurance company to understand what’s covered and take detailed photos of the vehicle, inside and out, before attempting cleaning or repairs.
- If your car was submerged while parked and the engine was not turned on, have the car towed to a trusted repair facility to be inspected and serviced before attempting to start the car. Draining and replacing engine oil, coolant and other fluids may be required if the car is repairable.
- Water damage may not be immediately apparent. Over time, components that were exposed to water can corrode, causing frustrating and expensive problems down the line. Inspect, clean and dry any electrical system components and connections.
- Moisture trapped deep in the recesses of a car can be a breeding ground for mold and bacteria. Pay attention to any odors and moisture on interior surfaces, particularly when the car is parked with the windows closed for a period of time.
- Following heavy storms, be on the lookout for new potholes caused by fast-moving rainwater and be cautious before driving through a puddle, which might conceal a deep pothole below the water’s surface.
During periods of intense rain, drivers should remember to always adjust their approach to driving. Slow down, increase following distance and never ignore warning signs or roadblocks. A road can become flooded within just minutes of a downpour, so it’s critical that drivers pay attention to emergency weather alerts and follow detours to avoid a dangerous situation.
Frequently Asked Questions
How much water does it take to damage a vehicle?
As little as six inches of water can cause a vehicle to lose control or stall. Water entering the engine can lead to hydrolock, which may result in severe engine damage.
Can a vehicle be swept away in floodwater?
Yes, twelve inches of moving water can carry away many passenger vehicles, while larger SUVs and trucks may be moved by approximately two feet of water.
What should I do if my vehicle was submerged while parked?
Do not attempt to start the vehicle. AAA Northeast recommends having the vehicle towed to a trusted repair facility for inspection and repairs, if needed, before driving again.
Is flood damage covered by auto insurance?
Flood-related vehicle damage is generally covered under comprehensive auto insurance coverage. Drivers should review their policy details and contact their insurance provider to understand their specific coverage.
What documentation should I collect before making repairs?
Take detailed photos of the vehicle’s exterior, interior and any visible damage to provide to your insurance provider.
Can flood damage appear weeks or months later?
Yes. Water intrusion can lead to corrosion of electrical components, wiring and connections. Moisture trapped inside the vehicle can also contribute to mold, unpleasant odors and other long-term issues.
What driving precautions should motorists take after heavy rain?
Drivers should slow down, increase following distance, watch for newly formed potholes, avoid standing water, monitor weather alerts and comply with road closures, barricades and detour instructions.
Last updated on August 5, 2026 by AAA Staff
Based in Rhode Island, Jillian Young is AAA Northeast’s director of public relations. She regularly appears in local TV, radio and print media to discuss traffic safety, travel, insurance and more.
