A lifeguard calls to swimmers at a beach in Miami on March 5. Amid fears of crowds fueling a new surge in coronavirus cases, Miami Beach on Saturday announced an abrupt curfew to curb swelling crowds of spring breaker visitors.

A life guard calls to swimmers at a beach in Miami, Florida, U.S., on Saturday, March 5, 2021. Even with some colleges canceling their mid-semester breaks, students from more than 200 schools are expected to visit Miami Beach during spring break, which runs from late February to mid-April. Photographer: Eva Marie Uzcategui/Bloomberg via Getty Images