THIRUVANANTHAPURAM: The Indian Meteorological Department (IMD) has predicted heavy rains in the state for the next five days. A yellow alert has been sounded today in Pathanamthitta, Idukki, Thrissur, Palakkad, Kozhikode and Wayanad districts. Fishermen have been warned not to venture into the sea. The IMD has asked people living in hilly areas that have received heavy rains in the past few days to remain alert.