Choosing the Right Car Window to Break
The windshield of a car is usually made of laminated glass, which consists of two layers of glass with a polyvinyl butyral (PVB) layer in between. This type of glass is designed to absorb impact from collisions, reduce noise, and block UV rays.
Laminated glass, as indicated by the “Laminated” marking on this Ford vehicle. Image source: Nebraska
Laminated glass is flexible and can bend and stretch. In the event of breakage, the pieces of glass stick together, reducing the risk of injury. However, this type of glass is challenging to break with regular tools.
On the other hand, the side and rear windows are made of tempered glass, which is 5 to 10 times stronger than regular glass. Tempered glass is more prone to shattering when subjected to impact from small, sharp objects. When it breaks, it crumbles into small, blunt pieces, making it safer for the occupants of the vehicle.
Therefore, in an emergency, focus on breaking the side windows to increase your chances of escaping before the car sinks.
Using a Car Hammer or Other Tools
In a sinking car, a car hammer is the ideal tool to break the windows and escape safely. Its small, sharp steel head concentrates force on the glass, effectively shattering tempered glass.
Watch this video for a demonstration:
Using a car hammer to break a window. Source: The Weather Channel
For best results, aim for the corners or edges of the side windows, as these are the weakest points of the glass and the most likely to break.
If you don’t have a car hammer, you can use other objects in the car to break the windows. These include a fire extinguisher, a metal flashlight, or even a high-heeled shoe. Any object with a small striking surface can concentrate enough force to shatter tempered glass.
In an emergency, if you can’t find any of these objects, you can use your car keys or the metal tongue of your seatbelt buckle. Striking the corner of the window with the sharp end of your key or the metal tongue of the seatbelt buckle can also break the glass.
Act Quickly and Wait for the Right Moment to Break the Window
As soon as you notice water entering the car, attempt to break the window immediately. At this point, the external water pressure is still low, making it easier to break the glass. If you wait too long, the rising water level will increase the external pressure, making it much more difficult to break the window. Time is critical, so take advantage of those first few seconds to escape.
However, if you are unable to break the window immediately due to high water pressure, wait for the water levels inside and outside the car to equalize. When the car is almost completely submerged, the pressure from both sides will be nearly equal, making it easier to break the window or open the door. While this is a temporary solution, it may increase your chances of survival if you can’t escape immediately.
If the glass has weakened due to water pressure or shows signs of cracking during the sinking process, you can use your hands, elbows, or feet to push and break it completely. However, this should only be attempted if the glass is noticeably weakened and there are no other options.
In a sinking car, quickly and effectively breaking the window is crucial for survival. Knowing which window to choose, using the right tools, and having the necessary emergency equipment can improve your chances of safely escaping a submerged vehicle.
According to VNN
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