11 things you shouldn’t leave in the car in summer

11 things you shouldn’t leave in the car in summer

If you park the car in direct sunlight at 22°C, after an hour the temperature inside will reach 48°C. And on a hot day, parts of the interior heat up to 70 °C. This is a monstrous heat, in which people, chilldren and pets should not be left under any circumstances.

Also, not all things can be stored in the cabin of the car. Here is a list of items that are better to take with you on a warm day.

1. Medications

Manufacturers recommend that most medicines be stored at a temperature not exceeding 25 °C, in a cool, light-protected place. Heat can affect the chemistry of the medicine and therefore its effectiveness.

If you have to carry the pills with you, keep them in a bag where they will be hidden from the sun’s rays and won’t get as hot as in the car.

2. Disposable plastic water bottles

Studies have shown that heat causes plastic to release more bisphenol A, a substance that supposedly can be toxic to humans and cause endocrine and metabolic disorders.

True, to conduct this experiment, the water was heated to 70 °C for four weeks, and these conditions are still far from reality. But in any case, it’s better not to risk and take the water with you, especially if you plan to leave your car in the heat for a long time.

Especially since bisphenol is not the only danger lurking in plastic bottles. Under direct sunlight, water and clear plastic can work like a lens – and even cause a car fire.

3. Gadgets

We are talking not only about phones and smartphones, but also any gadgets: tablets, laptops, gaming hand-consoles, MP3 players, children’s toys with batteries and so on. And here’s why. Heat negatively affects lithium batteries, reducing their lifespan. Device manufacturers (such as Apple) warn that temperatures above 35°C can damage the battery.

4. Sunscreen

Very hot weather can make sunscreen creams curdle, change their texture and lose their effectiveness. However, this also applies to ordinary creams.

5. Alcohol

For example, in beer, the heat produces 3-methyl-2-buten-thiol, a substance that gives the drink a disgusting bitter-sour taste and aroma reminiscent of the stench of a skunk. The wine, too, tastes bad and becomes harsher and more unpleasant. It is not for nothing that you keep it in the dark and cool – not higher than 20 °C.

6. Chocolate

Chocolate begins to melt at 25 °C. You will end up with only a brown puddle of chocolate left in the heated car.

7. Wax drawing crayons

They start to soften at 40 °C, and melt to a liquid at 48 °C. So if you don’t want to wash the seats and mats, make sure the kids don’t scatter crayons all over the car.

8. Food

Especially perishable food: ready meals, dairy products, eggs, meat, fish, cakes with cream and so on. It is not advisable to keep them out of the fridge for more than 2 hours, and if the outside temperature is higher than 32°C, the time is reduced to 1 hour.

After this time, it is not safe to eat, because the heat is very good for bacterial proliferation and it can affect the texture and consistency of food.

9. Lighters

They can explode and cause a fire. This applies mainly to gas lighters, but gasoline lighters are not completely safe either. The fuel in any case is packed in a cramped box and can expand greatly in the heat.

By the way, for this reason, it is better not to leave lighters in the sun: on a balcony, on a window sill, on the terrace of a country house. There have been cases where a forgotten lighter has resulted in a fire.

10. Aerosols

We’re talking about deodorants, air fresheners, throat sprays, and so on. The same thing can happen to them as to a lighter. The heat causes the air inside the can to expand, and it can explode and damage the interior.

A similar story in the summer heat can happen with pneumatic tires (e.g. for bicycles). It is also better not to leave them in the car with the air conditioner off.

11. Plants

Heat and dehydration can kill them, especially if you leave them on the car seat where the temperature rises to 50°C or more on a hot day.


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