My car entered flood water, what do I do right now?

If you are reading this with your leg still on the brake and water rising past your rim, here is the short version: do not start that engine. Not now, not in thirty minutes, not when the water finally clears. That single decision is the difference between a repair you can manage and an engine you will bury.

Now let's talk properly.

First, understand what Lagos is dealing with this year

This is not your imagination. NiMet's 2026 Seasonal Climate Prediction forecast above-normal rainfall across Lagos, projecting an average of around 1,965mm across the state's 20 local government areas and up to 2,010mm in the Badagry Division. NiMet, NIHSA and NEMA all flagged July through September as the peak flood risk window for Lagos this year.

And it has been delivering. The July 2026 downpours submerged Ago Palace Way in Okota, Gbagada, FESTAC, Ajah, Ikeja, Oworonshoki, Lekki, Victoria Island and even Bourdillon Road in Ikoyi went under. Cars floated. NEMA's Lagos office specifically named Badagry, Epe, Alimosho, Ikeja and Surulere as flash flood zones, and warned that Ikorodu and Isheri stay vulnerable to water releases from the Oyan Dam between July and October.

The Commissioner for Environment, Tokunbo Wahab, explained one downpour by pointing out that the lagoon level had risen by roughly a metre, which stops stormwater from discharging properly. Meaning: even when the rain stops, the water no get where to go. It will sit there. And your car will sit inside it.

So this is not a rare event you can ignore. If you drive in Lagos, this will happen to you eventually.

What to do in the first ten minutes

1. Kill the engine, immediately. If your car is still running and you are in water, switch it off. A running engine is actively sucking air through an intake that sits low usually behind the headlight or above the radiator. The moment that intake pulls water instead of air, water enters the combustion chamber. Water does not compress. The piston tries to squeeze it, the water refuses, and something has to give. That something is your connecting rod, your piston, sometimes your engine block. This is called hydrolock, and it is fast and violent.

2. Judge whether the water is moving. Standing water in a compound or a dip on the road is one thing. Flowing water is a different animal entirely. Roughly 12 inches of moving water is enough to push a car off the road. If water is flowing with force, forget the car. Get out. Your Camry is replaceable; you are not. If it is unsafe to exit, climb on the roof and call for help.

3. Get the car out but never by starting it. Push it. Tow it. Beg the boys at the junction. Anything except the ignition. And do not let anyone "just test if e go start" that is exactly how a ₦300,000 problem becomes a ₦3,000,000 one.

4. Disconnect the battery. Once you are on dry ground and it is safe to reach the engine bay, disconnect the negative terminal. Plenty of components in your car carry constant power even when the key is out. Water plus live current equals dead modules. Cut the power and you save components that could otherwise just be dried and cleaned.

5. Take photos. Plenty of them. Water line on the door. Water line on the tyre. Interior. Engine bay. The street with the flood still visible. Timestamped. You will need these for your insurance claim, and "I told them" is not evidence.

Reading the water line how bad is it?

The height the water reached tells you almost everything.

• Below the bottom of the doors: your engine is probably fine. Water may have reached the oil pan area. Let it dry a few hours, then check fluids before starting.
• Up to the top of the wheel rim: now you get work. Electronics were likely submerged, and water may have reached the intake or other critical systems.
• Above the bonnet: different ball game entirely. Assume water is in the intake, possibly the oil pan, possibly everywhere. Do not attempt anything yourself.
  

Before any start attempt, please do the following:

• Check the oil dipstick. If the oil looks like Milo, or sits above the full line, water is in your crankcase. Stop there.
• Check the air filter. Soaked filter confirms water entered the intake system.
• Check the transmission fluid. The gearbox is more sensitive to water than the engine and has over a hundred small parts inside. "It looks fine" is not good enough.

If there is any chance water reached the oil or transmission fluid, do not even crank it. Cranking whips water and oil into sludge and spreads it through the whole engine and gearbox. That turns a drain-and-inspect job into full disassembly.

The damage that shows up in December

Even if your car starts and drives afterwards, you are not finished. Flood water is corrosive, and it is patient.

Mould and mildew can begin developing within 24 to 48 hours in Lagos humidity. Corrosion creeps through wiring harnesses, fuse boxes, and control modules over weeks and months. The classic complaint "the car never drove the same again" is almost always said about a flooded car. Electrical gremlins that appear three months later, an AC that smells like a gutter, a dashboard light that comes and goes. That is the flood, still working.

Lift the carpets. Dry the interior properly with a dehumidifier or at minimum days of open-door sun. Change contaminated fluids engine oil, transmission, differential, brake fluid. Have every electrical function tested one by one.

One last thing: this is why "sharp deal" cars are dangerous

Every Lagos flood season creates a supply of quietly drowned cars. They get cleaned, detailed, sprayed with something that smells expensive, and pushed into the market. Rust around the battery tray and fuse box, a fresh detailing smell in the engine bay that doesn't match the car's age, mismatched VIN plates, a headliner with water stains, sand or silt under the spare tyre those are the tells. If a deal looks too sweet in August, be very suspicious.

Flood damage is one of those problems where the first hour decides the next five years of your car's life. The instinct to turn the key and check is the single most expensive instinct a Lagos driver has.

If your car has been in water and you are not sure what you are looking at, don't guess and don't let a roadside mechanic experiment on it. Rabbar Africa's certified technicians handle post-flood inspection, fluid contamination checks and electrical diagnostics at our Yaba workshop, and our team can also walk you through the documentation and insurance claim process so your paperwork doesn't cost you the 60-day settlement window. Reach us on +234 916 000 2836 or at 49 Akinwunmi Street, Alagomeji, Yaba.

Frequently Asked Questions

Can I start my car after it entered flood water? No. Do not start or even crank it until someone has checked the engine oil, air filter and transmission fluid for water. Starting a car with water in the cylinders causes hydrolock, which bends connecting rods and can crack the engine block.

Does comprehensive car insurance cover flood damage in Nigeria? Not always. Comprehensive is a category, not a standard specification some policies include flood damage, some offer it as an optional rider, and some exclude it. Check your policy document explicitly before flood season.

How deep is too deep to drive through water in Lagos? As a rule, if water reaches the bottom of your doors you are already at risk, and roughly 12 inches of moving water can push a vehicle off the road. If you cannot see the road surface or judge the depth, turn around.

How long do I have to report a flood damage claim? Most Nigerian policies require notification within 24 to 72 hours. Under NIIRA 2025, insurers must settle admitted claims within 60 days, but that countdown only starts once they have received all your documents.

How do I know if my car insurance is genuine? Visit askniid.org and enter your plate number or chassis number. The Nigeria Insurance Industry Database will confirm whether a valid, active policy exists.

My car was in flood but it still starts. Am I fine? Not necessarily. Corrosion in wiring and electronic modules can take weeks or months to surface, and mould can start developing within 24 to 48 hours. Get a full inspection even if the car drives.