Medical staff and security personnel assist concertgoers who fainted or required medical attention before a performance by South Korean singer-songwriter HWASA during the last week of the Rock in Rio music festival at the Rio 2016 Olympic Park in Rio de Janeiro, Brazil, on September 11, 2026. The event organizers displayed a message on the giant screens urging fans to step back and make room as a growing number of concertgoers required medical attention. (Photo by MAURO PIMENTEL / AFP via Getty Images)