With rain persisting in several areas of the district, the water level at Kakki and Anathode dam in Pathanamthitta is nearing full capacity on Saturday.
A red alert has been sounded in the region warning people living on the banks of Pampa and Kakkatar rivers on the likely release of water from the dams.
According to officials, the red alerts for the reservoir is issued when the water level rises to 978.33m respectively.
The release of water is likely to swell the Pamba river.
Pilgrims to Sabarimala have been advised against wading into the river for the ritualistic dip. Showers have instead been installed for the devotees to take baths.
