Cyclone Ditwah alerts heavy rain risks for Tamil Nadu and Kerala coasts

Forecast models show Cyclone Ditwah approaching the southern Indian coast, putting Tamil Nadu and parts of Kerala on alert for heavy to very heavy rainfall, strong winds and coastal flooding. Residents and authorities are bracing for widespread disruption over the next 48–72 hours.

Cyclone formation and projected path
Cyclone Ditwah formed over the southwest Bay of Bengal near the Sri Lankan coast late November 2025. It is tracking north-northwest at a slow pace of 7–10 km/h, expected to approach northern Tamil Nadu, Puducherry and adjoining south Andhra Pradesh coasts by November 30. Coastal Kerala is also under alert due to possible spill-over effects of heavy rainfall and rough seas.

Meteorological agencies have issued a sequence of warnings: yellow alerts initially, now upgraded to red alerts for several districts along the Tamil Nadu coast, signalling extremely heavy rainfall and severe weather conditions.

Rain and wind impact in Tamil Nadu and Kerala
For Tamil Nadu, heavy to very heavy rainfall is forecast from November 28–30, with isolated extremely heavy showers — over 200 mm in 24 hours — especially in coastal and delta districts. Storm-induced winds along coasts could reach speeds of 70-90 km/h, raising risks of uprooted trees, structural damage, and sea surges.

In Kerala, authorities have issued yellow alerts in several districts including Pathanamthitta, Idukki, Palakkad, Malappuram and Wayanad. Rough sea warnings extend along the Kerala coast and southeast Arabian Sea, disrupting fishing activities and coastal movement.

Precautionary actions and disruptions
State governments, district administrations and disaster management teams are on high alert. In Tamil Nadu, several districts have set up relief centres, and emergency services including NDRF/SDRF teams have been mobilised in flood-prone coastal and delta zones. Schools and colleges in the affected coastal belt have been ordered to remain shut till further notice.

Meanwhile, maritime and air travel are likely to see disruptions. Vessel movement along affected coastal waters is suspended; fishing activities have been banned until at least early December. Coastal flights have also been cancelled or delayed in view of expected bad weather.

What locals should do right now
People residing in low-lying coastal or delta areas should move to higher ground or relief shelters if advised. Avoid travel — especially by sea, boats, or along coastal roads. Secure loose roofs, signboards, and trees. Stay updated via local authorities, weather bulletins and official advisories.

Takeaways
Cyclone Ditwah formed over Bay of Bengal and is likely to impact Tamil Nadu, Kerala and south Andhra coasts.
Extremely heavy rainfall (200 mm+ per 24 hrs) and winds (70-90 km/h) raise flood, wind-damage and sea-surge risks.
Government has issued red/yellow alerts, activated relief measures, and shut schools in vulnerable districts.
Residents should stay alert, avoid coastal travel or fishing, and follow official advisories closely.

FAQ

What is Cyclone Ditwah’s projected landfall date?
Current forecasts suggest the cyclone will approach north Tamil Nadu–Puducherry–south Andhra Pradesh coast by early morning on November 30; rain and winds may start affecting coastal Kerala and Tamil Nadu before that.

Which areas are under highest risk?
Coastal and delta districts of Tamil Nadu — including Nagapattinam, Mayiladuthurai, Cuddalore, Puducherry — are under red alert. Several inland and coastal districts in Kerala also face heavy rainfall and rough seas.

Are fishing and maritime activities suspended?
Yes. Coastal waters along southern India, including the southeast Arabian Sea near Kerala, are under rough-sea warnings; fishing and other marine activities have been suspended until the cyclone passes.

How long will the heavy rain last?
Heavy to very heavy rainfall is likely between November 28 and December 1. Rainfall intensity is expected to taper after December 1, but isolated heavy showers may continue for a few days.