Texas flooding updates: Over 130 dead as flash flood threat increases in Texas

The death toll now stands at 80 in the wake of torrential rains and the resulting flooding in Texas.

By far the greatest number of fatalities occurred in Kerr County, where 68 people are believed to be dead, according to officials, including 28 children.

In Travis County, five people are believed dead, with three dead in Burnet County and one death each reported in Tom Green and Williamson counties, officials have said.

Search and rescue operations are ongoing.

The Federal Emergency Management Agency (FEMA) has been activated in Texas, according to the Department of Homeland Security (DHS).

The activation comes in the wake of President Trump on Sunday signing a disaster declaration for hard-hit Kerr County, where at least 59 people have died as a result of the torrential rains and resulting flooding.

The U.S. Coast Guard is also helping with search-and-rescue operations in the area, according to DHS, using helicopters and other aircraft equipped with thermal cameras to search for survivors.

DHS Secretary Kristi Noem is "on the ground with Governor Abbott and local leaders on Saturday and will continue to work to make sure Texas has the resources needed to respond and recover," the DHS statement said.

President Donald Trump posted on his social media platform Sunday morning that he has signed a "Major Disaster Declaration" for Kerr County, Texas.

The declaration is "to ensure that our Brave First Responders immediately have the resources they need," the post said, in part.

"These families are enduring an unimaginable tragedy, with many lives lost, and many still missing. The Trump Administration continues to work closely with State and Local Leaders. Secretary of Homeland Security Kristi Noem was on the ground yesterday with Governor Greg Abbott, who is working hard to help the people of his Great State," Trump also wrote.

Fifty-nine people are dead as a result of the flooding and torrential rains in Kerr County, Texas, Sheriff Larry Leitha said during a Sunday-morning press conference. That tally includes 38 adults and 21 children, Leitha said.

Leitha also said 11 campers and one counselor remained missing from Camp Mystic, located on the banks of the Guadalupe River.

Search and rescue efforts are ongoing, Leitha said.