Oklahoma City residents are being asked to help conserve water while power remains out at one of the city's main water treatment facilities.
City officials say rain and lightning during Monday night's storm delayed progress to restore power at the Draper Water Treatment Plant.
City spokeswoman Debbie Ragan says low water pressure is being reported in downtown Oklahoma City, the University of Oklahoma Health Sciences Center and the state Capitol complex.
Ragan says city officials hope to have power restored by Tuesday afternoon.
She says customers are being asked to turn off their sprinkler systems and postpone using water appliances like dishwashers and washing machines to help maintain the water already in the pipeline.