PET owners are warned to be wary of the signs of heat stress as maximum temperatures approach 40 degrees in parts of south-east Queensland, including Logan and the Scenic Rim.
RSPCA Queensland spokesperson Michael Beatty said the animal welfare organisation has been swamped with calls from people reporting heat stress this month.
"If it's 30 degrees outside, the temperature inside a car can potentially rise to well over 40 degrees in less than five minutes," Mr Beatty said.
"We tested a light coloured sedan and the temperature rose to 57 degrees in 12 minutes. Any animal inside would have been left dead."
Mr Beatty said it was important for people to remember that dogs without access to shade and water will die in Australian backyards.
"We would also recommend that there are at least two to three containers of water in case one gets knocked over," he said.
Jimboomba VetLove practice manager Lynette Hollis said a common sense approach to pet care was important as temperatures rise.
"I wouldn't sit in car for five minutes on a hot day," she said.
"If you don't feel comfortable doing it, don't let your dog do it."
Signs that a pet is suffering from heat stress include excessive panting, salivation, seizures, drooling, agitation and increased heart rate.
If a pet is experiencing heat stress, owners are encouraged to cool them slowly with a hose or wet towel.
Ice baths are not recommended.
Veterinarian Yuki Mak said dog breeds like pugs, French bulldogs and shih tzus were particularly vulnerable to heat.
"They are more likely to get heat stress because they don't breathe very well and can't pant to drop their temperature down," she said.
Ms Hollis said it was important for dog walkers to stop for regular water breaks and time trips appropriately.
"If you are walking your dog five kilometres you may have to do it early in the morning or later in the evening. You can't do it at 4pm in the afternoon like you used to in winter," Ms Hollis said.
