As the temperature rises, Isis, a 7-year-old African lion, enjoys an ice treat filled with beef bones at Brookfield Zoo. (Photo provided)
Hani, a 10-year-old sloth bear, and her 6-month-old cub, keep cool at Brookfield Zoo with some frozen ice treats topped with fruit. (Photo provided)
Whirl, an Amur tiger at Brookfield Zoo, cools off with a splash in her pool as temperatures heat up at the zoo this week.
Kids keeping cool watch as Hudson, one of the zoo's polar bears, seems to be enjoying a cool swim and a giant ice block. (Photo provided)
Hudson enjoys a cool dip on a hot day. (Photo provided)