The monsoon remains active over south and east India on September 21.
Heavy rain is forecast for Tamil Nadu, Andhra Pradesh and Kerala.
Odisha and Chhattisgarh may see isolated heavy rain.
Winds could gust to 60 kmph.
Fishermen are advised to stay ashore.
A yellow alert for Kerala indicates the possibility of heavy rainfall in the range of 64.5 mm to 115.5 mm.
Heavy rain is forecast at isolated places over the Andaman and Nicobar Islands and coastal Odisha, and isolated heavy rainfall is forecast over Chhattisgarh.
In Jharkhand, Ranchi is expected to see one or two rounds of showers and thunderstorms, with a maximum near 32 degrees Celsius and a minimum near 23 degrees.
Fishermen are advised not to venture into the Bay of Bengal where strong winds are forecast.
People in affected areas are advised to avoid open fields, trees and electric poles during thunderstorms and to check local bulletins before travelling.
The wet spell comes as the southwest monsoon enters its withdrawal phase, although active weather continues over southern and eastern India.
The India Meteorological Department has issued rain and thunderstorm warnings for around 13 states for Monday, September 21, 2026.
The states named include Tamil Nadu, Andhra Pradesh, Telangana, Karnataka, Kerala, Odisha, West Bengal, Bihar, Jharkhand, Chhattisgarh, Konkan and Goa, and parts of the Northeast.
Coastal Andhra Pradesh is expected to remain particularly wet, with warnings of heavy rain, thunderstorms, lightning and strong surface winds.
Isolated heavy rainfall is likely over Tamil Nadu, Puducherry and Karaikal, coastal Andhra Pradesh and Yanam, and Telangana.
Tamil Nadu, Rayalaseema and parts of Karnataka may also see thunderstorms with lightning and gusty winds.
Winds of 40 to 50 kmph, with gusts up to 60 kmph, are expected in the affected regions.
Over the east-central and adjoining north-east Bay of Bengal, winds of 45 to 55 kmph, gusting to 65 kmph, are expected.
Monsoon clouds in Bengal, India (representative image), Wikimedia Commons, CC BY 2.0
