New Delhi, Jan. 14 -- Animals at Rio de Janeiro's BioParque zoo received popsicles and frozen treats Tuesday as the city faced another day of extreme heat during Brazil's summer.

Jaguars, monkeys and other animals were given an iced diet prepared according to each species' needs, zoo officials said. Some received frozen fruit, while others were offered mixtures containing frozen blood.

A group of monkeys were handed watermelon popsicles by zoo keepers. A jaguar tried to fish out ground chicken popsicles from a tray that floated in its water tank.

"When she tries to fish out the frozen food, she ends up ingesting water as well," said Letizia Feitoza, a biologist at the zoo. "This is important for her hydration."

Zoo officials said the ...