Heavy Rain in Osaka: Simple Safety Tips for New Residents
Heavy Rain in Osaka: Simple Safety Tips for New Residents
Osaka has experienced periods of heavy rain recently, reminding us that even in a large, modern city, sudden downpours can cause disruption surprisingly quickly. In early September, Osaka City responded to heavy rain by opening voluntary evacuation shelters in parts of the city, while official rainfall observations also recorded significant rainfall around Osaka Prefecture.
For foreigners who have recently moved to Osaka, heavy rain can be a little confusing. Your phone may suddenly sound an emergency alert in Japanese, trains can be delayed, and streets that looked perfectly normal an hour earlier may begin collecting water.
At Apollo Properties Osaka, we encourage our tenants and other newcomers to take heavy-rain warnings seriously while remaining calm and prepared.
Why Heavy Rain Can Be a Problem in Osaka
One of the main concerns in the city is 内水氾濫 (naisui hanran), or urban flooding. This happens when intense rainfall overwhelms drainage and sewer systems, causing water to accumulate on streets and around buildings.
Osaka City notes that its sewer system has been developed with rainfall of approximately 60 mm per hour in mind, but very intense rainfall over a short period can still cause flooding.
There is an additional concern at present. Osaka City announced on September 8 that all six rainwater pumps serving the Naniwa large drainage channel remain out of operation, leaving some southeastern parts of the city more vulnerable than usual to flooding during heavy rain.
What Should You Do?
Before heavy rain arrives, check weather forecasts and emergency information regularly. If you live on a lower floor, consider moving important documents, electronics and valuables away from the floor.
Keep balconies and outdoor drains clear of leaves and rubbish. Osaka City specifically recommends checking gutters and drains so water can flow away properly.
During extremely heavy rain, avoid walking through flooded streets. Water can hide open drains, holes and other hazards. This is particularly important around manholes. Osaka City has warned residents not to approach sewer manholes during heavy rain following incidents in which pressure caused manhole covers to be displaced.
If an official evacuation instruction is issued for your area, don't ignore it simply because your building appears safe. Check where your nearest evacuation location is and follow instructions from local authorities.
A Little Preparation Goes a Long Way
September is still part of Japan's typhoon and heavy-rain season, so keeping a flashlight, drinking water, mobile battery, basic food and necessary medication at home is a sensible precaution. Osaka City also recommends checking local hazard maps and knowing your evacuation route in advance.
Living in Osaka is generally very safe, but understanding how to respond to Japan's weather and emergency alerts is an important part of settling into life here.
Stay dry, stay informed, and enjoy your time in Osaka!
Apollo Properties Osaka
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