A series of wildfires swept across the Texas Panhandle early Wednesday, prompting evacuations, cutting off power to thousands, and forcing the shutdown of a nuclear weapons facility as strong winds, dry grass and unseasonably warm temperatures fed the blazes.

An unknown number of homes and other structures in Hutchinson County were damaged or destroyed, local emergency officials said. The main facility that assembles and disassembles America’s nuclear arsenal shut down its operations Tuesday night.

“We have evacuated our personnel, non-essential personnel from the site, just in an abundance of caution,” Laef Pendergraft, a spokesperson for National Nuclear Security Administration’s Production Office at Pantex, said during a news conference. “But we do have a well-equipped fire department that has trained for these scenarios, that is on-site and watching and ready should any kind of real emergency arise on the plant site.”