CHICAGO — The Chicago Polar Plunge is taking place once again Sunday to help raise money for Special Olympics Chicago.

Nearly 4,000 people will brave the cold water for a good cause starting around 10 a.m.

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Last year’s event brought in more than 4,000 participants and hundreds of spectators.

The money raised will support thousands of Special Olympians who compete year-round in Chicago.

Crews from the Chicago Fire Department will be in the water ready to keep people safe as they take the plunge.