THIRUVANANTHAPURAM: The Meteorological Department has announced that rain will continue in the state till Monday. Yellow alert has been announced today in Alappuzha, Kottayam, Ernakulam, Idukki, Thrissur, Malappuram, Kozhikode, Kannur and Kasaragod districts and tomorrow in Ernakulam, Idukki, Thrissur, Malappuram, Kozhikode, Kannur and Kasaragod districts. Yellow alert was declared in Idukki, Thrissur, Malappuram, Kozhikode, Kannur and Kasaragod districts on Sunday and Idukki and Malappuram districts on Monday.