【Disaster Prevention Topics㉑】Be Careful of Heavy Rain

Japan has a period called "tsuyu" (rainy season) when there is a lot of rainfall before summer arrives.

Also, from summer to autumn, a lot of rain can fall due to typhoons, torrential downpours, and guerrilla rainstorms*.

Have you ever heard the phrase "X millimeters or more of rain per hour" in weather forecasts?

We will introduce the intensities and patterns of rainfall that are commonly heard in weather forecasts.

 

*Torrential downpours and guerrilla rainstorms: Very heavy rain that falls in a short period of time

For more information about rain-related terminology, please see the next page.

[Words Used in Weather Forecast News] The Words for Rain | TIPS

 

Hourly Rainfall Amount (mm)	Rain Intensity	What happens to people?	What happens outside?
10〜20	Moderately heavy rain	Rain splashes on the ground and your feet get wet	Puddles form on the ground
20〜30	Heavy rain	You get wet even with an umbrella
30〜50	Violent rain		Roads become like rivers
50〜80	Extremely violent rain	You get wet even with an umbrella	You can't see ahead due to the rain
80〜	Torrential rain

*Created with reference to the Japan Meteorological Agency's "Rain and Wind (Rain and Wind Classification Table)".
Images provided by the Japan Meteorological Agency.

 

Let's prepare before heavy rain and typhoons.

For more details, please watch this video.

The Disaster-Awareness Video | TIPS

 

For those who want to know more, please see the next page.

Preparations Before Heavy Rains/Typhoons | TIPS

Heavy Rainfall and Typhoons | TIPS

Japan Meteorological Agency