Firefighters worked through the night and into Wednesday morning at a recycling plant in Adams County, just northeast of Denver near Brighton Boulevard.

The fire sent an enormous plume of black smoke into the air on Tuesday afternoon, resulting in some street closures and coinciding with heavy traffic delays. Adams County Fire Rescue said the facility was a “metal recycling plant” near the 5600 block of York Street.

By Wednesday morning, more than 100 firefighters from 15 departments had been on the scene. About 40 people with six departments were on scene as of 7 a.m., according to Adams County Fire Department.

Footage from Denver7 showed fire crews spraying the scrap pile from multiple directions today, and the smoke seemed to have lessened significantly.

Denver Fire Department joined the effort on Tuesday afternoon. Tri-County Health will monitor air quality near the fire.