THIRUVANANTHAPURAM: Heavy rains are likely in the state today and tomorrow due to formation of low pressure in the Bay of Bengal. By Wednesday, the low pressure will be inactive. With this, it is estimated that the rainfall will decrease. Yellow alert has been issued in Alappuzha, Kottayam, Ernakulam, Idukki, Malappuram, Kozhikode, Wayanad, Kannur and Kasaragod today. Fishing is not allowed on the Kerala coast as there is a possibility of strong waves.