With the southwest monsoon set to intensify in Kerala over the next few days, the India Meteorological Department has sounded a red alert in Idukki, Pathanamthitta and Kottayam districts of the State.
The alarm has been sounded for Idukki district from July 18 to 20, Pathanamthitta and Kottayam districts for July 19.
The red alert has been given from July 19 as heavy to very heavy rainfall would occur in Ernakulam district.
The red alert is a call to immediately take preventive steps to evacuate people from vulnerable areas to shelter camps and provide others with emergency kits.
The districts are likely to receive extremely heavy rainfall upwards of 20 cm, an IMD official told PTI.
The officials said, Alappuzha district received heavy rainfall on July 17 with 6 cm of rain.
Other districts are predicted to get isolated heavy to very heavy rainfall on these days, though a red alert has not been issued for them.