The Windy City Smokeout is a four-day festival, and it got off to a wet start. Attendees were left drenched in a storm and had to briefly evacuate Thursday night. They were able to return to see the night's headliner.

Organizers said they communicate closely with the Chicago Police and the Office of Emergency Management and Communications to help with their evacuation plan.

The Windy City Smokeout Country Music and BBQ Festival began Thursday outside the United Center, and is set to run through Sunday. On Thursday evening, everyone had to leave as severe storms blew in.