Chicago, Illinois, USA. 21st August 2018. A red flag indicating unsafe swimming conditions flies from a lifeguard stand at Montrose Beach as two children play in the sand and a kite surfer speeds by. Stiff northeast winds whipped up surf on Lake Michigan, bringing out kayakers, kite surfers and wave watchers. Credit: Todd Bannor/Alamy Live News

- Image ID: PFNEDR

Chicago, Illinois, USA. 21st August 2018. A red flag indicating unsafe swimming conditions flies from a lifeguard stand at Montrose Beach as two children play in the sand and a kite surfer speeds by. Stiff northeast winds whipped up surf on Lake Michigan, bringing out kayakers, kite surfers and wave watchers. Credit: Todd Bannor/Alamy Live News

Royal Freedman / Alamy Stock Photo

Image ID: PFNEDR

Location: Chicago, IL, USA