The India Meteorological Department (IMD) has issued a red alert for Pathanamthitta, Kottayam and Idukki on Thursday (August 6), warning of extremely heavy rainfall in the districts. According to the IMD, extremely heavy rainfall refers to rainfall exceeding 204.4 mm within 24 hours. Red alert in three districts todayThe IMD has issued a red alert for the following districts on Thursday (August 6): Pathanamthitta, Kottayam and Idukki. A red alert indicates the possibility of extremely heavy rainfall at isolated places and calls for maximum preparedness. With a red alert issued for three districts and orange alerts in several others, many parents and students will be watching for school holiday announcements.