(TNND) — President Donald Trump said Sunday morning that he signed a major disaster declaration for a Texas county hit hardest by deadly flooding.

The declaration applies to Kerr County, Texas, and ensures federal resources are made available.

The death toll from flash floods rose to nearly 70 on Sunday, The Associated Press reported. The victims included children who were camping along the Guadalupe River in south-central Texas over the Fourth of July holiday weekend.

Kerr County officials said 11 campers and a camp counselor are still missing.

UPDATES: The latest on this tragedy from our station in San Antonio

“These families are enduring an unimaginable tragedy, with many lives lost, and many still missing,” Trump said in a Truth Social post. “The Trump Administration continues to work closely with State and Local Leaders."

Trump said the Coast Guard and state first responders have saved more than 850 lives during the floods in Texas.

Homeland Security Secretary Kristi Noem said federal emergency management resources are being deployed.

Texas Gov. Greg Abbott declared Sunday a Day of Prayer.