Thiruvananthapuram: The Central Meteorological Department has warned of heavy rains in the state. The State Disaster Management Authority (SDMA) has warned of isolated thunderstorms. Rain warning has been issued for Thiruvananthapuram, Kollam, Pathanamthitta, Idukki, Alappuzha, Kottayam, Wayanad, Ernakulam, and Thrissur districts during the next three hours. Chance of thunderstorms in isolated areas. The Central Meteorological Department has forecast winds of up to 40 kmph. Kerala, Karnataka, and Lakshadweep have been warned not to go fishing off the coast. These places are also likely to experience winds of 40 to 50 kmph.