Ms. Jackle and her fellow zookeepers were also wilting in the heat, but they said it was the animals they had to look out for.
“Obviously, your vigilance has to be increased on a day like today,” said John Piazza, the zoo’s mammal curator.
Treats are a must on steamy days. There were frozen bananas for the gorillas, and for the tamarin monkeys, heart-shaped ice cubes spiked with mealworms. The ostriches had a sprinkler to strut through.