
The India Meteorological Department (IMD) has issued an orange alert for Pathanamthitta, Kottayam and Idukki districts, forecasting very heavy rainfall of 115.6 mm to 204.4 mm in 24 hours at isolated places on Thursday, 1 October. Six other districts, Thiruvananthapuram, Kollam, Ernakulam, Palakkad, Malappuram and Wayanad, are under a yellow alert for heavy rain between 64.5 mm and 115.5 mm, along with thunderstorms.

No orange or yellow alerts have been listed for 2 October, which is Gandhi Jayanti and a national holiday. Yellow alerts return on 4 October for Pathanamthitta, Kottayam, Idukki and Ernakulam, and on 5 October for Pathanamthitta, Idukki and Malappuram. The IMD warned that residents in landslide- and flood-prone areas should remain cautious and avoid unnecessary travel. The radar-based warning for Thiruvananthapuram indicates moderate to heavy rain and winds up to 50 kmph over the next three hours.
The absence of alerts for 2 October may lead holiday-makers to let down their guard, but the IMD can revise warnings as conditions change, so the risk is not gone. Residents in hilly areas and near rivers or dams remain exposed to flash flooding even without an official alert. The return of yellow alerts on 4 and 5 October suggests the monsoon trough is active, but the bulletin does not declare a school holiday on those days, that decision rests with local authorities. The key watch item is whether the IMD revises the 2 October forecast upward as the system develops.
Source: mathrubhumi.com
This brief was synthesised by AI from the source linked above. Methodology and corrections.