Precautions for Travelling in Hot Temperatures in the UK and Europe

As summer temperatures soar across the UK and Europe, reaching record levels in July 2025, and heatwave become more frequent, planning your summer car journey is essential for the safety and comfort of you and your passengers. With increasing numbers of vehicles on the roads, hot weather can strain both your car and your health.  

Here’s a guide to key precautions you can take to avoid issues on the road. 

Prepare your car before setting off 

Hot weather aggravates existing mechanical issues, so a pre-trip check is vital for longer journeys: 

• Start with your cooling system: ensure coolant levels are topped up with a 50/50 mix of antifreeze and water to prevent overheating, which can lead to engine failure.  

• Check engine oil and brake fluid: high temperatures can degrade both.  

• Inspect your battery: heat accelerates wear, so test it if older than three years. 

• Tyres are crucial: verify pressure as hot air expands them risking blowouts, and check tread depth, which should be at least 1.6mm to be legal, but 3mm is recommended for safety.  

• Examine the windscreen: as heat can cause chips and cracks to spread. Repair these promptly to avoid visibility issues.  

• Park in shade: or use a sunshade to keep the interior cool, preventing dashboard damage and reducing air conditioning strain. 

Pack essentials like a warning triangle, which is mandatory in Europe for breakdowns, high-visibility vest, spare tyre or repair kit, and jump leads. For EVs, monitor battery health, as heat reduces efficiency. 

Prioritise personal safety and comfort 

Heat exhaustion is a real risk, especially in non-air-conditioned cars or during traffic jams: 

• Stay hydrated with plenty of water and avoid caffeinated drinks.  

• Wear sunglasses to cut glare, which can cause accidents.  

• Plan breaks every two hours to rest and cool down, particularly with children or elderly passengers. 

• Never leave pets or children in the car, as temperatures can rise to dangerous levels in minutes in extreme heat.  

• Use air conditioning wisely to pre-cool the car and recirculate air to maintain efficiency.  

• Carry a first-aid kit, sunscreen, and hats for roadside stops. 

Smart travel planning 

• Travel early morning or evening to avoid peak heat.  

• Check forecasts via apps like Met Office or Waze for heat alerts.  

• In Europe, note country-specific rules and requirements  

• Ensure you have breakdown cover and carry a phone charger. 

• Monitor dashboard lights for overheating or low fluids and stop if they illuminate. 

• Keep fuel topped up, as AC use increases consumption. 

Drive responsibly and enjoy the journey 

Hot weather travel in the UK and Europe needs preparation to avoid breakdowns or health risks. By maintaining your car, packing wisely, and planning routes, you can ensure a safe trip for you and your family, proactive steps save time and money.