06/29/2018
Hot Cars can come from cool temperatures - adults, kids, pets beware...
Researchers advise parents: ‘Take your child & Pets with you'
STANFORD, Calif. – Even on a relatively cool day, the temperature inside a parked car can quickly spike to life-threatening levels if the sun is out, researchers at the Stanford University School of Medicine have found. They hope their findings will put to rest the misconception that a parked car can be a safe place for a child or pet in mild weather.
"There are cases of children dying on days as cool as 70 degrees Fahrenheit," said lead author Catherine McLaren, MD, clinical instructor in emergency medicine. Though past research has documented the temperature spike inside a car on extremely hot days, this is the first time anyone has looked at cooler days, she added. Children, adults with health issues, older adults may sitcom more quickly. Same is true for pets.
McLaren collaborated with James Quinn, MD, associate professor of emergency medicine, and Jan Null, an independent certified consulting meteorologist, to measure the temperature rise inside a parked car on sunny days with highs ranging from 72 to 96 degrees F. Their results, published in the July issue of the journal Pediatrics, showed that a car's interior can heat up by an average of 40 degrees F within an hour, regardless of ambient temperature. Eighty percent of the temperature rise occurred within the first half-hour.
"On a cool day, you don't feel hot so you believe it will be OK," Quinn said. "But ambient temperature doesn't matter; it's whether it's sunny out." Much like the sun can warm a greenhouse in winter, it can also warm a parked car on cool days. In both cases, the sun heats up a mass of air trapped under glass.
In such cases, the caretaker sometimes takes certain precautions, such as cracking a window or running the air conditioner prior to parking the car. But the researchers found that such measures are inadequate: a cracked window had an insignificant effect on both the rate of heating and the final temperature after an hour, and the air conditioner trick only delayed the temperature spike by about five minutes.
Null said he would like to investigate other variables, such as the car's color, the shape and size of the interior, or the effect of tinted windows. But he is satisfied with the outcome of this study on its own. "One reviewer made the comment that this paper will save lives," Null said. "That's just about the best comment you can get."
Stanford Medicine integrates research, medical education and health care at its three institutions - Stanford University School of Medicine, Stanford Health Care (formerly Stanford Hospital & Clinics), and Lucile Packard Children's Hospital Stanford. For more information, please visit the Office of Communication & Public Affairs site at http://mednews.stanford.edu.
Pets 75 will quickly become 90,
85 will quickly become 133
Most people don't realize how hot it can get in a parked car on a balmy day. However, on a 78 degree day, temperatures in a car parked in the shade can exceed 90 degrees -- and hit a scorching 160 degrees if parked in the sun! Best not to leave them even at 60 degrees. Eighty percent of the temperature rise occurred within the first half-hour. Even on a relatively cool day, the temperature inside a parked car can quickly spike to life-threatening levels if the sun is out. Precautions such as cracking a window, It takes only minutes for a pet left in a vehicle on a warm day to succumb to heatstroke and sow or running the air conditioner prior to parking the car were found to be inadequate.
Rolling down a window or parking in the shade doesn't guarantee protection either, since temperatures can still climb into the danger zone. Animals are not able to sweat like humans do. Dogs cool themselves by panting and by sweating through their paws. If they have only overheated air to breathe, animals can collapse, suffer brain damage and possibly die of heatstroke. Just 15 minutes can be enough for an animal's body temperature to climb from a normal 102.5 to deadly levels that will damage the nervous and cardiovascular systems, often leaving the animal comatose, dehydrated and at risk of permanent impairment or death. P.S.: It's possible for it to be too hot for a dog in your yard too. Tragically, 19 dogs died last week in the Phoenix area.