Flight operations at Cochin International Airport in Kerala have been stopped till 3 pm on Sunday due to heavy rain, airport officials said today. The water level in Periyar river and a canal near the airport has been rising. The Kerala government said a red alert - likelihood of very heavy to extremely heavy rainfall - has been issued for four districts: Wayanad, Idukki, Malappuram and Kozhikode. Chief Minister Pinarayi Vijayan met with officials of the State Disaster Management Authority at their control room to oversee coordination of relief and rescue operations on Thursday.