Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Parked cars get dangerously hot, even on cool days


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.

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.

"Cars get hot, we know this intuitively," Null said. "But this study tells us that cars get hot very fast." McLaren, Quinn and Null hope their work will help educate parents and caretakers about the risk associated with leaving a child or pet in a parked car. Null said a substantial number of caretakers intentionally leave children behind because they mistakenly think conditions are safe.

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.

"If more people knew the danger of leaving their children in the car, they probably wouldn’t do it," McLaren said. The solution is simple, she added: take your child with you when you park the car.

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."

Matthew Wright | EurekAlert!
Further information:

More articles from Studies and Analyses:

nachricht Diagnoses: When Are Several Opinions Better Than One?
19.07.2016 | Max-Planck-Institut für Bildungsforschung

nachricht High in calories and low in nutrients when adolescents share pictures of food online
07.04.2016 | University of Gothenburg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>