The Midwest was hit with severe thunderstorms this past weekend, which forced Lollapalooza organizers to evacuate 100,000 or so festival-goers on Sunday. Despite the dangerous weather, Paul McCartney performed “Get Back” and “FourFiveSeconds” with the Alabama Shakes’ Brittany Howard, A$AP Rocky and Vic Mensa wilded out to Nirvana, and our photographer Mallory Turner caught up with artists between sets and shot portraits; check them out above.