No, you should open your windows during a tornado . It is a dangerous myth that opening windows equalizes air pressure to prevent a house from "exploding". In reality, doing so wastes critical time and significantly increases the risk of structural failure and injury. Why Opening Windows Is Dangerous
Where, exactly, did we get the idea that opening up a house to equalize pressure in a tornado would work? And is there some other ... HowStuffWorks Tornado Myths - Missouri StormAware “Opening the windows in your house before a tornado will reduce damage by balancing the pressure inside and outside the structure. Storm Aware (.gov) What to do During a Tornado - National Weather Service What to do During a Tornado. ... Tornadoes, Wind, Hail. ... Find out what you can do when a tornado strikes. Acting quickly is key... National Weather Service (.gov) Tornado Safety Measures - Mercer Police Department Inside a Building * Flying debris is the greatest danger in tornadoes. * Avoid windows. If you make any effort to open windows, th... Mercer Police Department Does opening your windows during severe weather really help ... Mar 10, 2026 — should you open your windows during a tornado
In the past, some people believed that opening windows during a tornado would help equalize the air pressure inside and outside your home, thereby reducing the likelihood of your roof being torn off or your windows shattering. The idea was that if the pressure inside and outside your home was the same, the force of the wind would be less likely to cause damage. No, you should open your windows during a tornado
Furthermore, the practical reality of a tornado emergency makes the "open windows" advice not just ineffective but lethally distracting. When a tornado warning is issued for your area, you have a matter of minutes—often only seconds—to take life-saving action. Precious time spent running around the house trying to open multiple windows is time not spent moving yourself and your family to a safe location, such as a basement, storm cellar, or an interior room without windows on the lowest floor. Moreover, opening a window puts you in close proximity to glass just as the storm arrives. Flying debris—a 2x4 traveling at 100 mph, or shards of shattered glass—is a primary cause of injury and death in tornadoes. The act of opening a window could expose you directly to that deadly debris. In a tornado, your single, exclusive priority is to put as many solid walls between you and the outside as possible. Opening a window directly violates that principle. Why Opening Windows Is Dangerous Where, exactly, did
The origin of the "open windows" myth can be traced to a misunderstanding of how tornadoes destroy buildings. The theory held that the extreme pressure drop inside a tornado’s vortex would cause a house to burst outward from the inside, similar to a balloon popping in a vacuum. This idea was popularized in the mid-20th century, appearing in textbooks and even government guidelines. However, modern research, particularly from engineering studies of tornado damage and wind dynamics, has thoroughly debunked this hypothesis. High-speed photography and post-storm structural analyses reveal that the vast majority of building failures during a tornado are not caused by internal pressure explosions, but by the sheer, overwhelming force of extreme winds and flying debris. A tornado is not a vacuum cleaner; it is a billion-pound sledgehammer of rotating air moving at 100 to 300 miles per hour. The primary threat is the wind itself, not the pressure drop.