CENTENNIAL, Colo. (KDVR) — While the moisture in the metro area is much appreciated, the storm that brought it was not.

South Metro Fire Rescue said crews responded to three lightning-sparked structure fires from Sunday night into Monday morning.

Lightning and thunder were seen and heard around the Denver metro startling many and even making one resident think the worst.

“It hit the building and I just jumped up, like … hey I thought Russia was coming. I said ‘they’re coming Jack’ cause you know it’s the middle of the night, you know and that’s when usually you know you’re most vulnerable,” one metro resident said. “So I’m thinking the worst, I’m not thinking lightning.”

A large trash fire was burning at a metal recycling plant in Denver Monday morning but the cause of the blaze has yet to be determined. The Denver Fire Department said large amounts of metals are involved in the fire, and a hidden fire in the pile made it difficult to put out.

SMFR warned residents to evacuate their homes and call 911 if they see smoke or flames.