Minnesota Gov. Tim Walz says one of the state's elite K-9 units is heading to central Texas to aid in search and recovery efforts following the devastating floods.

The death toll in the July 4 Central Texas flooding rose to 103 on Friday as the search continued for those still missing.

Thirteen people are dead and more than 20 people unaccounted for after heavy rain lashed Texas, leading to "catastrophic" flooding. Children are among the dead, and about 23 campers from a summer camp in the area, Camp Mystic, are unaccounted for, said Lt. Gov. Dan Patrick, who has taken on the duties of acting governor.