Heavy rains and weather alerts in Chennai and Tamil Nadu
Chennai is trending due to heavy rainfall that led to school closures and significant waterlogging. A combination of the Northeast monsoon and low-pressure systems in the Bay of Bengal is expected to sustain this wet weather through October 26.
What happened
- 20 Oct, 2026
Heavy overnight rain hits several areas around Chennai [1].
- 21 Oct, 2026
Schools in five districts, including Chennai, are closed; MGR Nagar records 15 cm of rain [1].
- 22 Oct, 2026
IMD issues orange alerts for Tamil Nadu and other southern regions warning of very heavy rain [2].
- 23 Oct, 2026
A new low-pressure system is expected to develop over the Bay of Bengal [2].
What you need to know
Heavy rain is forecast to continue across the state until October 26 [1].
Orange alerts are in place for rainfall between 115.6mm and 204.4mm in some areas [2].
Fishermen are warned to stay away from affected waters due to strong winds and poor marine conditions [2].
Residents must inspect and repair rainwater harvesting systems immediately [1].
It is not confirmed how many people have relocated to shelter homes along the Palar River.
Background
The Northeast monsoon has intensified, bringing heavy rain to north coastal districts. In Chennai, officials have noted that ongoing Metro Rail construction has contributed to water stagnation in areas like T. Nagar [1].
The India Meteorological Department (IMD) is monitoring multiple systems, including a cyclonic circulation moving from the North Andaman Sea toward the Bay of Bengal, which is expected to increase rainfall across southern India [2].
Questions people ask
When will the heavy rain in Tamil Nadu end?
The Regional Meteorological Centre expects the wet weather to last until October 26, 2026 [1].
What alerts has the IMD issued?
An orange alert has been issued for Tamil Nadu, Puducherry, Karaikal, Mahe, and Kerala [2].
Where this came from
[1] thehindu.com
Tamil Nadu rain updates: Warning to residents along Palar river
Preview image from thehindu.com
[2] downtoearth.org.in
Daily weather tracker: IMD warns of very heavy rain in Kerala, Tamil Nadu; western disturbance set to affect Northwest India from October 24
Preview image from downtoearth.org.in
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