People plunge into freezing Lake Michigan during Chicago Polar Bear Club 24th annual Polar Plunge event at Oak Street Beach on Jan. 25, 2025. The event was sold out after selling 1,000 tickets.

Sunday marked the 2025 Polar Plunge Chicago, benefiting Special Olympics Illinois and Special Children's Charities. ABC7 meteorologist Jaisol Martinez said the water temperature was in the mid-30s.