As temperatures soared to 29.7°C in parts of Scotland, motoring experts are warning drivers about lesser-known risks that come with hot weather driving. The Met Office recorded the high in Threave, Dumfries and Galloway on July 10, while Glasgow and Tyndrum saw temperatures just above 27°C.
Hidden Dangers Inside a Hot Car
Majid Ismailzada, director of GM Direct Hire, warns that the temperature inside a parked car can exceed 50°C on a warm day. He states: "Most people don't realise just how much heat can affect both vehicles and drivers. On a warm day, the temperature inside a parked car can easily exceed 50°C. At those temperatures, you're not just dealing with discomfort. You're creating conditions that can affect electronics, vehicle performance, tyre safety and even the effectiveness of medications."
Tyre Pressure Risks
Hot weather causes air inside tyres to expand, increasing pressure. If tyres are already overinflated, this can lead to increased wear, reduced grip, and potential blowouts on long journeys.
Electronics and Adhesives
Smartphones left in direct sunlight on dashboards can overheat and shut down temporarily. Dashcams, phone holders, and sat-nav mounts may fall off because adhesives and suction mounts weaken in extreme temperatures. Ismailzada notes: "We regularly see reports of dashcams, phone holders and sat-nav mounts falling from windscreens during heatwaves because the adhesive can struggle in extreme temperatures."
Medications and Dangerous Items
Prolonged heat exposure can affect how medications work. Drivers should keep medications on their person rather than in gloveboxes or handbags left in the car. Portable chargers, aerosol products, and vape batteries should also be removed from vehicles, as they can become dangerous in high heat.
Driver Safety
Dehydration can impair concentration, decision-making, and reaction times. Ismailzada advises: "Staying hydrated is just as important as checking your vehicle."
Precautions for Summer Driving
- Check tyre pressures before setting off
- Ensure coolant levels are topped up
- Carry extra drinking water
- Use sunshades where possible
- Park in shaded areas
- Avoid leaving electronics in direct sunlight
- Remove power banks, aerosols and vape devices from vehicles
- Test air conditioning systems before longer journeys
- Take regular breaks on long drives
