The IMD has warned of very heavy rainfall in sub-Himalayan West Bengal and Sikkim as part of an active weather system through September 23.
Bihar and Odisha are forecast to see heavy rain through September 18, while Chhattisgarh braces for heavy rainfall between September 20 and 23.
Thunderstorms with heavy rain are expected in Himachal Pradesh, Jammu and Kashmir, and Punjab during the same period.
Widespread rainfall is also forecast across east Madhya Pradesh, Vidarbha, Konkan and Goa, Gujarat, Kerala, and the Andaman and Nicobar Islands.
Gusty winds of up to 60 kmph are expected in Gujarat, Maharashtra, Tamil Nadu and coastal Andhra Pradesh as the southwest monsoon begins withdrawing.
Isolated heavy rainfall was recorded over East Rajasthan on September 17-18, alongside the wider spell of rain affecting northern and eastern states.
Residents in affected states have been advised to stay updated with local IMD bulletins and avoid non-essential travel during periods of heavy rainfall or strong winds.
The India Meteorological Department typically issues color-coded alerts (yellow, orange and red) as conditions intensify, urging precautionary measures in the most severely affected districts.
Heavy rainfall is also forecast for Bihar and Odisha through September 18, with Chhattisgarh expected to see heavy rain between September 20 and 23.
Himachal Pradesh, Jammu and Kashmir, and Punjab are under alert for heavy rainfall accompanied by thunderstorms during the forecast period.
Widespread to fairly widespread rainfall is expected across east Madhya Pradesh, Vidarbha, Gangetic West Bengal, Konkan and Goa, and the Gujarat region.
Kerala, Mahe, Lakshadweep and the Andaman and Nicobar Islands are also forecast to see widespread rainfall during the period.
Gusty winds of 30-50 kmph are expected over Gujarat, Konkan and Goa, Saurashtra and Kutch, and Madhya Maharashtra.
Stronger gusts of 40-60 kmph have been forecast for Tamil Nadu, Puducherry and Karaikal, Coastal Andhra Pradesh, and Rayalaseema.
Monsoon clouds over a city (representative image), Wikimedia Commons, CC BY-SA 4.0