India rain monsoon Kerala
Fishermen row their traditional boats as they set out to fish in the morning in Kochi, Kerala, on Monday, June 1, 2020. The southwest monsoon hit Kerala on Monday marking the beginning of the four-month season of rains in the country. Image Credit: AP

New Delhi: The southwest monsoon has made an onset over Kerala, marking the commencement of the four-month long rainfall season, the India Meteorological Department said on Monday.

The four-month monsoon season from June to September accounts for 75 per cent of rainfall in the country.

Private forecaster Skymet Weather on May 30 had declared arrival of monsoon, but the IMD had differed, saying conditions were not ripe then for such an announcement.

The Indian Meteorological Department (IMD) has issued a yellow alert for nine districts of the state on Monday.

The alert has been issued for Thiruvananthapuram, Kollam, Pathanamthitta, Alappuzha, Kottayam, Ernakulam, Idukki, Malappuram, and Kannur districts on June 1.

"Heavy rainfall is predicted and isolated areas are expected to receive 64.5 mm to 115.5 mm rain in 24 hours. The yellow alert is meant to warn the public and concerned officials to the situation," said the Kerala State Disaster Management Authority (KSDMA).

KSDMA also issued a warning to those who live in areas prone to floods, landslides, and riverbanks, saying that they should take special precautions in case of strong winds and rain. Those living in coastal areas should also take adequate precautions, it said.

IMD has issued yellow alert for Ernakulam, Thrissur, Malappuram, Kozhikode, and Kasaragod on June 2. IMD has placed Kannur and Kasaragod under yellow alert on June 3.