Till late on Thursday the toll was eight, but a fresh count took the numbers to 23 on Friday. The worst affected districts include Malappuram, Kozhikode, Kannur, Wayanad, Kasargode and Idukki and the deaths have also been reported from these areas.
There has been 260 mm of rain in Wayanad the parliamentary constituency of former Congress President Rahul Gandhi. A huge landslide has marooned around 2,000 people in Meppadi in the district.
A temple, mosque and estate workers quarters have collapsed in the area. It's from this area that four bodies have been recovered from under the debris.
With the area still cut off, Gandhi has urged for help from the Centre. Authorities are trying their best to get the Air Force to begin rescue operations.
All schools, colleges and other educational institutions were shut in all the 14 districts on Friday keeping in mind the devastating rain and flood that had hit the state in a century last year.
Kerala Chief Minister Pinarayi Vijayan has sought the Indian Army's help in relief and rescue operations.
A dozen teams of the National Disaster Response Force (NDRF) are already at the job.
The situation worsened as the pace of the rising level of water is causing serious concern in parts of Pathanamthitta and Thrissur with most of the rivers there in spate.
Around 500 of those marooned in Meppadi have been moved to relief camps, a medical professional of the state government who is giving the required medical attention told the media that even though there are no serious ailments, all of them are in a state of mental shock.
"We have assured all people, that they do not have to worry , as the state government will take care of their needs," State Education Minister C. Raveendranath said.
The railways have cancelled 12 trains and many had to be diverted. Road traffic has also been thrown out of gear with many stretches vanishing under water.
The Cochin airport has been closed till Sunday leaving hundreds of passengers stranded.
( With inputs from IANS )