Lollapalooza fans may be used to the rain and mud, but it appears the festival's kick-off could be hit with some severe weather.
Thunderstorms are likely Thursday afternoon and evening in the Chicago area, some of which could become severe.
The storms bring with them the threat for damaging winds, heavy rain and hail.
The storms are expected to move east and out of the area by the early morning hours Friday as temperatures drop.
Friday looks to stay much cooler and less humid, with highs in the upper-60s and low-70s.
The first Lolla performances are slated to begin at noon Thursday.
The threat for rain showers will return again Saturday night and into Sunday.
Lolla-goers have long celebrated rain or shine during the summer weekend festival, but storms have hit during the event in the past.
In 2015, stormy weather forced a temporary evacuation and prompted organizers to move up times for remaining acts on the final day of the fest.
While it remains unclear what policy organizers will use if severe weather arrives Thursday, there are three emergency evacuation shelters located in the area: Grant Park North, Grant Park South and Millennium Lakeside Garages. All shelters can be accessed through vehicle entrances on Michigan Avenue.