- By Sarju Saran Tiwari
- Thu, 04 Dec 2025 01:34 AM (IST)
- Source:JND
Tamil Nadu School Holiday (4 December): Heavy rains lashed Chennai and parts of the Tamil Nadu coast and interior on Wednesday after a depression over the Bay of Bengal weakened into a well-marked low-pressure area. The system, which had already brought continuous rain to the region for two days, continued to pour heavy rain, triggering several alerts and rescue operations.
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According to the Regional Meteorological Centre (RMC), heavy rains are expected in 25 districts of Tamil Nadu today. An orange alert has been issued for Chennai, the Nilgiris, the ghat areas of Coimbatore, Tiruvallur, Ranipet, Kanchipuram, and Chengalpattu, indicating the possibility of heavy rain and local flooding.
Meanwhile, a yellow alert is in effect in Kanyakumari, Tirunelveli, Tenkasi, Theni, Dindigul, Tiruppur, Salem, Erode, Tirupattur, Vellore, Tiruvannamalai, Madurai, Virudhunagar, Ariyalur, Dharmapuri, Cuddalore, Villupuram, Kallakurichi, and Puducherry, indicating moderate to heavy rainfall.
All schools in Chennai and Tiruvallur districts, Tamil Nadu, will remain closed on Thursday, 4 December 2025, due to heavy rain.
Low-Pressure System Persists Off Tamil Nadu Coast
The RMC stated in its morning bulletin that the system is slowly moving:
"The depression over the southwest Bay of Bengal and adjoining west-central Bay of Bengal yesterday moved southwestwards and weakened into a well-marked low-pressure area off the north Tamil Nadu-Puducherry coasts by Wednesday morning.
The associated cyclonic circulation extends up to 7.6 km above mean sea level and is likely to weaken further and move southwestwards during the next 24 hours." The bulletin also stated that a trough is extending from the low-pressure area to Lakshadweep, passing through north interior Tamil Nadu, south interior Karnataka and north Kerala – something that is increasing rainfall across the region.
Heavy Rains In Chennai, Tiruvallur, Chengalpattu, and Kanchipuram District:
Heavy rains lashed Chennai, Tiruvallur, Chengalpattu, and Kanchipuram, flooding neighbourhoods and main roads. In Red Hills, nine people trapped in their homes were rescued by Fire and Rescue Service personnel using boats and taken to relief camps.
Wednesday marked the third consecutive day of rain, disrupting normal life. Small businesses reported losses due to low footfall, while vehicular traffic slowed in several districts. Due to Cyclone Ditwah and its impact, many parts of Tamil Nadu have been experiencing continuous rainfall for the past week. In light of this, schools may be declared closed in some districts today, December 4, 2025.
IMD Weather Alert For 4 December:
The IMD advisory states that squally weather with wind speeds of 35-45 kmph, gusting up to 55 kmph, will prevail over the Arabian Sea and off the Kerala coast on December 4. Fishermen have been advised not to venture into the sea during this period. The IMD has also warned of thunderstorms with lightning across Puducherry, Karaikal and other parts of Tamil Nadu.
Additionally, an ocean currents alert has been issued for the Chennai coast from Palavakkam to Lakshmipuram Odaikuppam, with surface current speeds of 1.4-1.5 m/sec forecasted until 7 PM on December 4. Harbour and marine operations have been urged to exercise caution.
School Holiday Update: Will Tamil Nadu Schools Be Closed On 4 December?
Schools in Chennai and Tiruvallur districts of Tamil Nadu will remain closed on Thursday, December 4, 2025, due to persistent heavy rainfall caused by Cyclone Ditwah. In other states and districts, most schools will function as usual, with decisions on local closures made by respective district administrations based on weather conditions