Storm and Flood Driving Safety: How to Protect Your Car and Yourself

At a glance

Why "Turn Around, Don't Drown" isn't just a slogan

It's tempting to assume you can judge floodwater depth by eye, but roads erode and washout underneath standing water in ways you can't see from the driver's seat, and moving water carries far more force than it looks like. NOAA and NHTSA both push the same message because a large share of flood deaths happen inside vehicles that drove into water the driver assumed was shallow. If you can't clearly see the road surface, or water is moving across the road at all, the only safe move is to turn around.

Before the storm: prepping your car

Ahead of hurricane or severe storm season, check that your tires have adequate tread (at least 4/32" for good wet-weather grip), your wiper blades clear the windshield without streaking, and your battery holds a charge — a weak battery is far more likely to strand you in bad weather. Keep your gas tank at least half full during active storm forecasts in case of extended detours or fuel station outages, and know your evacuation route in advance rather than looking it up mid-storm.

During: safe driving in heavy rain and flooding

Slow down well before you think you need to — hydroplaning can start at speeds as low as 35 mph in heavy rain. Increase following distance, avoid sudden braking or steering inputs, and turn on headlights (required in most states when wipers are running). If you encounter standing water across the road, do not attempt to cross it: find an alternate route or wait it out. If your car does stall in rising water, get out and move to higher ground immediately rather than staying with the vehicle.

After: what to check before restarting a flooded car

If water reached the interior floor or the engine bay, do not attempt to start the car — water in the cylinders can cause catastrophic engine damage (hydrolock), and water-contaminated electrical systems can short out or create a shock hazard. Have the vehicle towed to a shop for inspection, and if the interior got wet, dry it out quickly and thoroughly to prevent mold and long-term electrical corrosion in wiring harnesses and control modules.

Insurance: does comprehensive cover flood damage

Standard liability and even standard collision coverage typically exclude flood damage. Comprehensive coverage — an optional add-on in every state — is what actually pays for flood, hail, and similar weather-related damage, so if you live in a flood-prone area it's worth confirming you carry it rather than assuming your policy includes it by default.

Warning signs of a flood-damaged used car

Flood-damaged vehicles frequently get cleaned up and resold, sometimes across state lines with the flood history laundered off the title. Watch for a musty smell, water stains under carpeting or in the trunk spare-tire well, mismatched or newer-than-expected upholstery, rust in unusual spots like inside door hinges, and a foggy interior of headlights or gauge clusters. A vehicle history report and a pre-purchase inspection are the best defense.