THIRUVANANTHAPURAM: The Indian Meteorological Department has warned that there is a possibility of heavy rain in five districts in the state within the next three hours. Pathanamthitta, Kottayam, Alappuzha, Ernakulam and Idukki districts are likely to experience heavy rain with thunder at isolated places. Wind gusts of up to 40 kilometers per hour are also possible, according to the warning.