Automotive and meteorological experts warn that leaving certain objects exposed to extreme heat in the cabin can compromise passenger safety and the vehicle's integrity.

Speaking to the Auto ao Minuto news portal, the ADAC (Allgemeiner Deutscher Automobil-Club), Europe's largest automobile club, emphasised the importance of removing all heat-sensitive items from the vehicle interior during the summer.

Key recommendation

A key recommendation from the German association is the immediate removal of electronic devices such as mobile phones, computers, and power banks, as lithium-ion batteries risk suffering permanent damage or even catching fire.

This warning also applies to pressurised containers, including lighters and aerosol cans (such as deodorants or hairsprays), as the risk of explosion rises exponentially due to gas expansion caused by the heat.

Preventive measures

The need for preventive measures is further underscored by the American weather service AccuWeather, which warns of the dangers of leaving clear plastic bottles or glass objects on the upholstery or dashboard.

These materials can act like a magnifying glass, concentrating sunlight onto a single point and creating a refraction that can ignite a fire inside the vehicle.

Additionally, perishable items such as medications, sunscreens, and certain foods should always be removed, as they can lose their effectiveness and deteriorate rapidly under extreme heat.

Illusory protection

Many drivers turn to the glove compartment or the central storage bins beneath the armrest, hoping to shield items from direct sunlight.

However, the ADAC clarifies that this protection is illusory, confirming that temperatures in these enclosed spaces rise high enough to cause damage comparable to that seen in exposed areas.

Finally, for reasons extending beyond temperature concerns, specifically regarding road safety and crime prevention, authorities advise against ever leaving personal identification documents, bank cards, or valuables inside the vehicle, thereby minimising the material and administrative consequences in the event of theft.