Chennai heavy rain crossed 120 mm at multiple locations in the 24 hours to 6 am on October 21, as a low-pressure area over the southwest Bay of Bengal strengthened the possibility of an intense three-day spell across Tamil Nadu. Water accumulated on roads in Chennai and neighbouring districts, prompting municipal officials to carry out drainage and water-removal operations, Dinamalar reported.
The low-pressure area has formed over the southwest Bay of Bengal near Sri Lanka, according to the report. The monsoon is expected to become more active from October 21 to October 23, with rain forecast across several parts of Tamil Nadu during the period.
The heaviest rainfall recorded in the report was 122 mm at Saidapet, followed by 121 mm at Kolapakkam and 115 mm at Alandur. Valasaravakkam received 109 mm, while Madipakkam and Maduravoyal recorded 107 mm each. Nerkundram recorded 106 mm and Nungambakkam 105 mm.
Other Chennai locations also recorded substantial rainfall. Adyar received 101 mm, Korattur 91 mm, Saligramam 89 mm, Porur 82 mm, Anna Nagar West 79 mm, Egmore 74 mm and Kadappakkam 75 mm. The report also listed 95 mm at Utharakosamangai, 88 mm at Kolachal, 86 mm at Athipettai and 75 mm at Manalar Dam.
The distribution of rainfall shows that the episode affected several parts of the Chennai urban region rather than being confined to one locality. The presence of high readings across southern, western and central neighbourhoods places pressure on road drainage, low-lying stretches and daily travel routes as the weather system remains active.
Municipal authorities were reported to be engaged in clearing water from roads. The operations come as the forecast indicates that rainfall may continue across multiple districts on October 21. For residents, the immediate concerns are waterlogged roads, slower movement and disruption to regular travel during periods of heavy rain.
Dinamalar also reported that holidays had been announced for schools in some Tamil Nadu districts because of the heavy rainfall. The available report identifies the school-closure decision but does not provide the district list in the supplied text.
The rainfall figures were measured over the 24-hour period ending at 6 am on October 21. Further rain across Tamil Nadu is expected through October 23 as the low-pressure system continues to influence the southwest Bay of Bengal, while municipal teams remain engaged in removing accumulated water from affected roads.
