At least three people died in a South Texas county after around 20 inches of rain fell on the Rio Grande Valley, causing what the state agriculture commissioner called catastrophic flooding.

The deaths occurred in Hidalgo County, near the U.S.-Mexico border, where County Judge Richard F. Cortez issued a disaster declaration.

More details about the deaths were not immediately released, “except that they involved law enforcement efforts,” the county said in a statement.

“This is a devastating…