Lollapalooza 2026 concluded Sunday in Chicago's Grant Park after a four-day run marked by repeated weather disruptions, including a four-hour delay and a partially cut lineup during the festival's third day. Rain problems began Friday, when steady showers forced Lil Uzi Vert to postpone his scheduled set, though the rest of the day's performances continued as planned. The disruptions escalated significantly overnight into Saturday, when heavy rainfall flooded sections of Grant Park, leaving Hutchinson Field, home to two of the festival's main stages, saturated with standing water by early morning. The Chicago Office of Emergency Management and Communications reported a combined 67 ambulance transports and 10 arrests across all four days, with no citations or tickets issued. Attention now turns to next year's lineup announcement and to whether organizers make any changes to grounds drainage or scheduling contingencies at Grant Park following this year's flooding.