Thirty-five out of the forty-two dams within the state were opened for the first time in history. All five overflow gates of the Idukki Dam were opened at the same time, for the first time in 26 years.[13] Heavy rains in Wayanad and Idukki have caused severe landslides and have left the hilly districts isolated.[14][10] The situation was regularly monitored by the Prime Minister and the National Crisis Management Committee coordinated the rescue and relief operations
The Government of Kerala started a donation website for flood victims.[44] As of 28 August 2018, ₹718 crore (US$100 million) was collected from the public.[45]
Prime Minister of India, Narendra Modi announced a sum of ₹500 crore (US$73 million) as interim relief for Kerala on 18 August 2018. This is in addition to ₹100 crore (US$15 million) announced by the Home Minister on 12 August 2018.[46] The central government also said in its press release that this ₹600 crore (US$87 million) is only the advance assistance and that additional funds will be released by the NDRF when an inter-ministerial team visits again and assesses the damage.[15][47]
European Union has announced an assistance of ₹1.53 crore (US$220,000) in aid funding to the Indian Red Cross Society for providing relief to flood-affected people in Kerala.[48]