2021 South India floods
| Part of the 2021 North Indian Ocean cyclone season | |
| Date | 6 – 12 November 2021 (3 years, 7 months, 1 week and 5 days) |
|---|---|
| Location | India (Tamil Nadu, Andhra Pradesh) Sri Lanka |
| Also known as | 2021 Tamil Nadu floods, India-Sri Lanka floods, Chennai floods |
| Type | Flood |
| Cause | Depression BOB 05 and a low pressure system associated with the Northeast monsoon |
| Deaths | 41 total (16 in India; 25 in Sri Lanka) |
| Property damage | Unknown |
The 2021 South India floods are a series of floods associated with Depression BOB 05 and a low pressure system that caused widespread disruption across the Indian states of Tamil Nadu, Andhra Pradesh, and the nearby Sri Lanka. The rainfall started on 1 November in Tamil Nadu. The flooding was caused by extremely heavy downpours from BOB 05, killing at least 41 people across India and Sri Lanka.