THIRUVANANTHAPURAM: IMD has warned about the temperatures rising to 4 degrees Celsius in the coming days in Kerala. A yellow alert has been issued in Kottayam, Pathanamthitta, Alappuzha, Ernakulam, Thrissur, Kozhikode, Kannur and Kasaragod districts on Tuesday. The weather department foresees the temperature reaching a torrid 39 degrees Celsius in many parts of the state.