With the UK bracing for a heatwave expected to push temperatures as high as 38°C over the next four days, drivers are being urged to use a one-minute trick to cool their car interiors safely. Cars can become dangerously hot due to the greenhouse effect, with sunlight entering through windows and being trapped by dark seats and dashboards. Outside temperatures above 30°C can push car interiors to 45-55°C in just 20 minutes, and even 65°C if exposed to prolonged sun.
The One-Minute Cooling Method
Simon England, founder of GAP insurance provider ALA Insurance, recommends a simple technique: roll down one rear window fully, then on the opposite side, open and close the front door 8 to 10 times without slamming it. “It sounds a bit odd, but it genuinely works better than you’d expect,” England said. “It helps push the hot air out and draw cooler air in.”
Correct Use of Air Conditioning
Many drivers misuse their car's recirculation setting, accidentally trapping hot air inside. Instead of immediately switching the air conditioning to high, experts advise first pushing out the hot air. England adds: “Put the AC on high, aimed at your face or feet, and keep recirculate off so you’re not shifting warm air around. Drop all windows and drive to push heat out. After 2-3 minutes, roll the windows up and switch recirculate on and cool air will circulate as intended.”
Dangers of Hot Cars
Hot cars pose serious health risks, including heatstroke symptoms such as tiredness, dizziness, and headache, which can impair driving. The UK Health Security Agency warns: “Small, closed spaces such as stationary cars can get dangerously hot very quickly.” Motorists are advised to follow these cooling tips to ensure safety during the heatwave.
