Heavy to very heavy rains are expected in 16 states, including Kerala, Uttarakhand and West Bengal, in next two days. Fishermen are advised not to venture in central Arabian sea.
In a statement, the National Disaster Management Authority (NDMA) said heavy rains are also expected in large areas along Bay of Bengal.
The NDMA said quoting a bulletin of the India Meteorological Department that red warning for heavy to very heavy rain at a few places with extremely heavy falls at isolated places are very likely over Uttarakhand tomorrow and day after.
As many as 718 people have lost their lives in incidents related to floods and rains in seven states during the monsoon season so far.
Head of the Weather Services of IMD, M Mohpatra said, due to formation of low pressure area over North Bay of Bengal, the rainfall is expected to increase over coast of Odisha, West Bengal and North Coast of Andhra Pradesh after 24 hour.
He said, fishermen have been advised not to venture into the sea during the period.