The five latest fatalities from the rain that began a week ago came when authorities in the southern state were forced to release water from 35 dangerously full dams, sending a surge into its main river.
"Presently, 35 reservoirs in the state are releasing water. Many districts in the state are facing floods," the state's chief minister, Pinarayi Vijayan, said on Twitter.
The airport in the port city of Kochi will stay shut until Saturday afternoon.
The rain and floods have destroyed and damaged hundreds of houses in the past week and caused significant losses to crops in the state known for its spices and coffee.
A senior official with the Kerala State Disaster Management Authority, Sekhar Lukose Kuriakose, said the seasonal rains have killed more than 200 people in the state since May and displaced many.
The state last saw such devastating flooding in 1924.
Famous for its coastline and picturesque backwaters, Kerala has become a major destination for domestic and international tourists.