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Why Firefighters Smash Car Windows Blocking Hydrants (It's Not What You Think)????

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When a car is parked in front of a fire hydrant and firefighters arrive at a burning building, you might see them smashing the car's windows and running the hose straight through it. At first glance, it might seem harsh or unnecessary. Many people assume firefighters could simply run the hose under or over the car. But the reality is very different, and the reason comes down to safety, physics, and the extreme pressure inside firefighting equipment.
A typical fire hose used for main water supply lines is about 5 inches wide, which already makes it difficult to fit beneath most modern vehicles without compressing the hose. However, the bigger issue appears once the hose is filled with water. When pressurized water rushes through the hose, it becomes incredibly rigid and stiff. Instead of behaving like a flexible garden hose, it essentially acts like a solid pipe under intense pressure.
Because of this, bending the hose over a car would cause it to kink, instantly restricting the water flow. Even a small kink can drastically reduce water pressure, which could put firefighters battling the flames inside the building in serious danger. That is why, in emergencies, firefighters may break a car window and run the hose directly through the vehicle — ensuring the fastest and safest supply of water when every second matters.
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