For many people, a car has become more than just a vehicle. It is often used to store bags, gadgets, medicines, water bottles and other everyday essentials. In a hurry, it is easy to leave something behind after parking the car.

However, this seemingly harmless habit can sometimes damage your belongings, create safety risks or even put your health at risk. During summer, the temperature inside a parked car can rise rapidly, while humidity and moisture during the monsoon can create additional problems.

Here are some things you should avoid leaving inside your car for long periods.

1. Medicines

Medicines should not be routinely stored inside a parked car, especially during hot weather.

High temperatures can affect the stability and quality of certain medicines and may reduce their effectiveness. Some medicines also have specific storage requirements that need to be followed.

If you regularly take medication, check its storage instructions and take it with you when you leave the vehicle rather than leaving it exposed to extreme temperatures.

2. Mobile phones, laptops and other electronics

Phones, laptops, tablets, power banks and other electronic devices can be sensitive to extreme heat.

A vehicle parked in direct sunlight can become much hotter than the outside temperature. Prolonged heat exposure can affect batteries and electronic components and may shorten the life of your devices.

There is another risk too: theft. Leaving an expensive gadget in plain sight can attract unwanted attention. Always take valuable electronics with you when possible.

3. Sunscreen

Sunscreen is another product that should not be left in a hot car for extended periods.

Excessive heat can affect some of its ingredients and potentially reduce product quality. Heat can also damage the packaging, causing the container to leak or become deformed.

Instead, keep sunscreen in a suitable place and carry it with you when you leave the vehicle.

4. Plastic water bottles

Many people keep a plastic bottle in their car for convenience. But if a disposable plastic bottle has been sitting in a very hot vehicle for hours, it is better not to rely on it as your regular drinking-water source.

Heat can affect the plastic and may increase the migration of certain substances into the water. A reusable bottle designed for drinking water, such as a stainless-steel bottle, can be a better option for keeping water with you.

The simplest approach is to carry fresh drinking water rather than leaving a plastic bottle inside a hot car for long periods.

5. Handbags and purses

Never make it easy for thieves to spot your valuables.

A handbag, purse or shopping bag left on the car seat can attract attention even if you believe there is nothing valuable inside. A thief may break a window simply to find out what the bag contains.

Whenever possible, take your valuables with you. If something absolutely has to remain in the vehicle temporarily, keep it out of sight rather than leaving it on a visible seat.

6. Important documents

Passports, identity documents, bank papers, vehicle documents and other sensitive paperwork should not be unnecessarily left inside a parked car.

Apart from the risk of theft, heat and moisture can damage some documents. Losing important papers can also create unnecessary stress and expense.

Keep important documents with you whenever possible.

7. Aerosol cans and other heat-sensitive items

Some aerosol products and other pressurised containers should not be exposed to high temperatures. Extreme heat can increase pressure inside a container and create a safety hazard.

Check the storage instructions on products before leaving them inside a parked vehicle, particularly during very hot weather.

A simple check can prevent a major problem

Before getting out of your car, take a few seconds to look at the front seats, dashboard and back seat. Check whether you have left behind your phone, laptop, medicines, water bottle, handbag or any other valuable or heat-sensitive item.

This small habit can protect your health, save your belongings from unnecessary damage and reduce the risk of theft.

The safest rule is simple: if an item is valuable, heat-sensitive, medically important or personally irreplaceable, don't leave it sitting inside a parked car.