As the drought has worsened, officials are now providing drinking water supplies to the affected people.
"We are providing water bowsers and tanks to the areas," Pradeep Kodippili, a relief official said.
The number of people being provided drinking water has now risen to 624,522, up from 200,000 six days ago with more provinces being hit by the drought.
The worst hit area is the North central province where 145,048 people are being supplied drinking water followed by the eastern province where 133,313 people are affected.