Kentucky, United States (AP) — At least 25 people died — including four children — when torrential rains swamped towns across Appalachia, Kentucky’s governor said Saturday.

“We continue to pray for the families that have suffered an unfathomable loss,” Governor Andy Beshear said. ”Some having lost almost everyone in their household.”

Beshear said the number would likely rise significantly and it could take weeks to find all the victims of the record flash flooding. Rescue crews continue the struggle to get into hard-hit areas, some of them among the poorest places in America.

“I’m worried that we’re going to be finding bodies for weeks to come,” Beshear said during a midday briefing.

He said it’s still an active search and rescue operation with a goal of getting as many people to safety as possible. Crews have made more than 1,200 rescues from helicopters and boats, the governor said.

Beshear, who flew over parts of the flood-stricken region on Friday, described it as “just total devastation, the likes of which we have never seen.”

“We are committed to a full rebuilding effort to get these folks back on their feet,” Beshear said. “But for now, we’re just praying that we don’t lose anybody else.”

The rain let up early Friday after parts of eastern Kentucky received between 8 and 10 1/2 inches (20-27 centimeters) over 48 hours. But some waterways were not expected to crest until Saturday.

As rainfall hammered Appalachia this week, water tumbled down hillsides and into valleys and hollows where it swelled creeks and streams coursing through small towns. The torrent engulfed homes and businesses and trashed vehicles. Mudslides marooned some people on steep slopes.

President Joe Biden declared a federal disaster to direct relief money to more than a dozen Kentucky counties.

The floodwaters raging through Appalachia were so swift that some people trapped in their homes couldn’t be immediately reached, said Floyd County Judge-Executive Robbie Williams.

Portions of some state roads in Kentucky were blocked due to flooding or mudslides. Rescue crews in Virginia and West Virginia worked to reach people where roads weren’t passable.

About 18,000 utility customers in Kentucky remained without power early Saturday, poweroutage.us reported.