"They'll start getting really lethargic, they'll slow down, some animals actually even collapse," said Jenna Anthony with Friends of the Animal Shelter.
Anthony recommends pet owners limit a dog's time under the sun because of the extreme heat.
"A mile hike is probably not the best idea at noon," she said.
"Usually, we recommend early in the morning before it gets too, terribly warm. Or, late at night," said Dr. Ronald Palmer from East Hills Animal Clinic.
If you are out walking your four-legged friend and you notice signs like a dry mouth and nose, Dr. Palmer says that is indication the dog is overheating and you should immediately get them to cold water.
"Not ice water because that can throw them into shock," Anthony said.
"You can cool them down pretty quickly with just putting a hose on them or something like that because the water will be kind of cool," said Dr. Palmer.
Though the heat is a major concern this time of year, humidity is also a problem.
"So, if you put him [the dog] in a closed room and it's real humid, even though it's cool and you have fans moving they can still overheat," he said.
"If a dog's really thirsty, give him little bits over time. Otherwise, they can vomit the water back up if they have too much at once," said Anthony.
Anthony said pet owners should avoid walking dogs when the sun is as its peak and always have water nearby.