The government issued a red alert in northern districts-Kozhikode, Wayanad, Kannur, Palakkad, Kasargod and Malappuram- in view of heavy rain forecast till June 18.
Five people were killed in a massive landslide while another died after falling into a river in Kozhikode on Thursday.Among those who lost their lives in the landslide at remote Kattipara village in Thamarassery taluk included three children of a family, sources said.
A total of 18 people were reported missing in various northern districts, that was battered by heavy rains for the past two days.
Several roads including national highways, criss-crossing the Kozhikode-Wayanad areas, went under a sheet of water, disrupting movement of traffic.
Gushing rain water flooded low-lying areas and water entered several houses in Malappuram, Kannur, Wayanad and Kozhikode, causing serious damage to them. Property loss and widespread damage of crops were reported across the state.
Major dams have reached their maximum storage capacity and the level at various rivers has risen.
Authorities asked people living downstream of Kakkayam reservoir in Kozhikode and Neyyar dam in Thiruvananthapuram to remain vigilant.
Chief Minister Pinarayi Vijayan directed the Chief Secretary and respective district collectors to take up urgent relief measures in rain-affected areas.