Japan’s Rainy Season Brings Flood Risk to Drivers, May 27

Japan is entering its rainy season, bringing increased risk of flooding in urban areas. Recent years have seen more frequent heavy rainfall and linear rain bands, making water damage to vehicles a growing concern. In September 2025, Tokyo experienced record rainfall that caused widespread flooding and vehicle damage. Drivers need to know how to respond if their car gets submerged.

When Flash Floods Hit Urban Roads

Japan’s cities face rapid water accumulation during intense rainfall. Road flooding and underground parking garage submersion happen quickly, putting vehicles at serious risk. The September 2025 Tokyo rainfall caused extensive floor-level flooding across 23 wards in the western part of the city.

What Not to Do With a Flooded Car

Never attempt to start a submerged engine or drive through deep water. Turning the ignition key after water enters the engine can cause severe mechanical damage. Experts warn that flooded vehicles require immediate professional inspection before any restart attempts.

Parking Lot Safety During Heavy Rain

Ground-level and basement parking areas flood fastest during downpours. Drivers should avoid parking in low-lying zones when rain forecasts predict heavy rainfall. Parking lot management needs clear traffic flow rules to prevent accidents during evacuation and reduce congestion when drivers rush to move vehicles.

Preparing for the Rainy Season

Check weather forecasts before parking in flood-prone areas like underground garages and low-lying streets. Keep emergency contact numbers for your insurance company and roadside assistance. Move your vehicle to higher ground if heavy rainfall is predicted for your area.

Final Thoughts

As Japan’s rainy season intensifies, drivers must take precautions to protect vehicles from flood damage. Avoid driving through standing water and never restart a submerged engine. Planning ahead by parking in safe locations can prevent costly repairs.

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The content shared by Meyka AI PTY LTD is solely for research and informational purposes.  Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.