Rescuers scoured a devastated central Texas landscape of mangled trees, overturned cars and muck-filled debris Saturday in an increasingly bleak mission to locate survivors, including 27 girls who have not been seen since their camp was slammed with a wall of water in a historic flash flood.

Parts of central Texas saw a month’s worth of rain in just a few hours overnight into Friday, prompting multiple flash flood emergencies. Follow for live updates on the rescue effort, including the search for more than 20 girls from a summer camp in the region.

Texas Governor Greg Abbott said he had asked President Donald Trump to sign a disaster declaration, which would unlock federal aid for those affected.