(qlmbusinessnews.com . Sat 21st Jun, 2025) London, UK —
Protect Your Car and Health: What Not to Leave Inside During a UK Heatwave
With temperatures across parts of the United Kingdom, including Surrey, expected to soar up to a whopping 34C over the coming weekend, motorists are being advised to rid their cars of four common items to prevent serious damage amid the baking conditions.
The UK's national weather service, the Met Office, has outlined that a “heatwave threshold” in the country is achieved when a location documents at least three successive days of daily maximum temperatures that meet or surpass the heatwave temperature threshold for that area. This threshold varies from county to county.

Regions like Greater London, Surrey, Buckinghamshire, Berkshire, Hertfordshire, Bedfordshire, and Cambridgeshire are classified in the highest bracket for this threshold. According to the Met Office, the daily maximum temperature in these areas must reach at least 28C for the conditions to be officially recognized as a heatwave.
Among the items drivers are being cautioned to avoid leaving in their cars during these sweltering conditions are bottled water, sun cream, medicines, and battery-powered electronic devices, as reported by the Express.
Leaving bottled water in cars, particularly under the unabating gaze of the sun, can lead to harmful chemicals leaching from the plastic into the water, rendering it unsafe for consumption. In cases of intense heat, water bottles situated where sunlight can magnify through them could potentially cause a fire by focusing the rays on interior surfaces such as carpets or seats.
Similarly, sun cream, a must-have during hot spells for skin protection, can damage a car's interior if left within. The heat can make the plastic bottles brittle and potentially cause the sun cream to burst out, in addition to diminishing its protective efficacy against UV rays.
Medicines, including paracetamol and other analgesics, may also lose their effectiveness when exposed to high temperatures inside a vehicle. Although they might look unaffected, the heat can change how the active ingredients function. Medical guidance generally includes a maximum storage temperature on medication packets, which drivers are advised to consult to determine if a medicine is safe to keep in their car.
Lastly, high temperatures pose a risk to battery-powered electronics left in vehicles, such as smartphones, cameras, and laptops. These items contain dense battery packs that should not be exposed to temperatures above 40C, as it can decrease their efficiency, drain their charge more rapidly, and even present a fire risk in extreme heat conditions.
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