An estimate of 20 girls remained missing after deadly flooding caused “destructive” floods at Camp Mystic in Hunt, Texas, Lt. Gov. Dan Patrick said.

The death toll from devastating floods in the Texas Hill Country rose to 24 Friday night, officials said, as the search for more than 20 people missing from a girls summer camp continued through the night.

The National Weather Service issued at least five flash flood emergencies, the most severe form of flood warning, Friday in several counties in south-central Texas.