Emergency responders continue to search for missing people and local police said efforts have been slowed by "sightseers who are making things worse."

Authorities on Sunday were in a desperate search to find those still missing after historic flash floods swept across central Texas — including 10 children from a beloved all-girls camp — as the death toll rose and forecasters warned of more rain.

A search for Texas flood survivors intensified as Texas Governor Greg Abbott issued a disaster declaration for nearly two dozen Texas counties.

Local officials warned the number of dead will likely rise and were due to give an update on Sunday morning, as search and rescue teams raced to find 27 girls missing from a camp near the Guadalupe River,

Kerr County, Texas and national search and rescue operations will continue Monday around the Guadalupe River, where families wait for news of their loved ones.

The Texas summer camp where children died in flooding is in an area meteorologists refer to as "Flash Flood Alley."