The official said though the rainfall forecast for September is above normal, it will not help overcome the deficit.
The “Ground Truthing” or verification, which is essential for a realistic and credible determination of drought at the taluk level will be done by selecting 10 villages in each taluk.
Castle Rock region has been recording over 100 mm of rainfall over the last few days.
To ensure safety, District Commissioners have declared holidays for schools and colleges in the vulnerable regions.
Gadag deputy commissioner Vaishali M L has instructed officials to shift residents of mud houses to safer places.
The Sandhyavandana Mantapa of Shankaracharya of Sringeri Peetam in Chikkamagaluru was completely submerged due to the swollen Tunga river.
The district administration has declared a holiday on Monday for schools and colleges.
The Meteorological department has issued an orange-red alert for the coastal districts of Dakshina Kannada, Udupi and Uttara Kannada for Saturday.
Fishermen are advised not to venture into the sea till July 8.
There is fear that the rain deficit could hit agriculture and create a power and drinking water shortage. The revenue minister has already admitted a drinking water crisis in over 800 habitations.
In South Interior Karnataka, Kottigehara in Chikkamagaluru received 3 cm rainfall and Bengaluru received 1 cm rainfall on June 9.