Heavy rainfall is a rainfall greater than 100 mm in 24 hours.
Precipitation or rain fall is caused when moisture-containing air moves over land or coincide into a storm system.
Light rainfall is designed less than 0.10 inches of rain per hour while moderate rainfall measures 0.10 to 0.30 inches of rain per hour and heavy rainfall is more than 0.30 inches of rain per hour. for example Mawsynram receives the highest rainfall in India. It is reportedly the wettest place on Earth.
Heavy rain fall can cause Flooding Due to excess water that can collect in the streets other disadvantaged includes soil erosion and increase in ground water level .
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