"It's pretty devastating," said Kara Gilbert, an office support specialist who was answering telephones at the zoo. "We can all look out and see half of the zoo under water."
The zoo's polar bear, Berlin, escaped from her pen and was tranquilised by the zoo's vet and quarantined, the zoo said. Two seals also escaped, but were captured.
No deaths or serious injuries were reported as a result of the heavy rains and flooding.