Many people admit that leaving a bottle of water on the seat is something they often do, without ever imagining the serious consequences. Moreover, some car experts point out another risk: bottles placed on the passenger seat can roll off and get stuck under the brake or accelerator pedals. In emergencies where the driver needs to brake suddenly, a bottle lodged under the brake pedal could be extremely dangerous.
Beyond fire hazards, keeping bottled water in a hot car for extended periods also poses health risks. A previous study revealed that drinking water stored in plastic bottles exposed to high temperatures over long periods can release harmful substances, potentially damaging health.
The study specifically highlighted cases where drivers left water bottles behind the seat for months, then casually drank from them whenever they felt thirsty after getting into the car. This seemingly harmless habit can silently undermine health every day.
Research shows that when outside temperatures range from 80°F (27°C) to 100°F (38°C), the interior of a car without air conditioning can heat up to between 130°F (54°C) and 172°F (77°C). These temperatures are even higher than the “low” setting of a conventional oven.
Another study by the American Academy of Pediatrics found that as time passes, the temperature difference inside cars remains minimal whether the windows are completely closed or slightly open. In both cases, the temperature inside can increase by about 40°C within one hour, even if the outside temperature is only 22°C.
The takeaway: It’s best to break this habit before it’s too late. If you must leave bottled water in the car, at least wrap it carefully and avoid placing it in areas directly exposed to sunligh
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