McManus said the clinic was doing a routine cleaning when two chemicals reacted -- causing "a toxic cloud."
Temperatures outside hovered around 90 degrees at the time, according to the National Weather Service.
None of the animals were injured, McManus said, adding that the motor home-sized rehab unit helped animals and staff weather the weather.
He said hazmat personnel were able to vent the building, clean the chemicals and that staff and animals re-entered the site sometime around 1:15 p.m.
http://www.newsday.com/long-island/nassau/westbury-animal-hospital-evacuated-pets-and-all-after-chemical-reaction-fire-official-says-1.10688065
