Are EVs actually safer than fuel-powered cars in floods?

As little as six inches (15 cm) of water can cause drivers to lose control, while 30 cm of moving water is enough to push a car off course, Scrap Car Comparison says.

The U.K.’s Automobile Association also advises against driving into water deeper than 10 cm and the Environment Agency notes that driving remains the leading cause of death in flooded areas.

Electric vehicles are designed to be as safe as internal combustion engine cars in wet conditions and can even be charged in the rain, according to the National Roads and Motorists’ Association (NRMA). Their battery packs and high-voltage systems are sealed against water ingress and built to withstand exposure.

Cars driving in flood road in Hanoi. Photo by VnExpress/Quynh Tran

However, both EVs and fuel-powered cars face the same risks in floods. Hidden debris can puncture a fuel tank or damage a battery, while immersion in saltwater increases the chance of short circuits and fires, the Electric Vehicle Council of Australia warns.

Wet roads bring added dangers. Hydroplaning, or aquaplaning, occurs when a layer of water builds between tyres and the road, reducing grip and causing loss of control. The Institute of Electrical and Electronics Engineers estimates that around 20% of wet-weather accidents involve hydroplaning.

Despite these risks, studies show that many motorists still attempt to cross flooded roads to evacuate, rescue family members, or simply follow other drivers. Australia's National Road Safety Partnership Program lists social pressure as a key factor, including fear of being late for work or school.

"It’s best to set a good example, as people are more likely to drive through flood waters if they see others doing it; do not encourage this behavior by doing it yourself," Silvia Morris, manager at RACV Drive School, said.

"If in doubt, stay out," she advised. "In extreme weather conditions, choose to postpone your journey. It’s just not worth the risk to put yourselves and others in danger."

If a vehicle does become stranded, drivers should exit as quickly as possible, Scrap Car Comparison recommends. The NRMA warns that EVs should not be charged after immersion, as damaged lithium-ion batteries may ignite days or even weeks later and must be inspected by qualified technicians.