Swimming pools scramble to overcome lifeguard shortage as opening day looms. Teen workforce, unnerved by COVID-19, proves hard to reach.

Zachary Olenek, 20, from left, Danielle Hrinowich, 18, Morgan Miller, 15, and Mikie Kilbourne, 18, tread water with their hands up during lifeguard testing at the Rakow Center outdoor pool in Carpentersville on May 12, 2021. (Stacey Wescott / Chicago Tribune)