Should I Crack My Windows During A Hurricane?

When It Makes Sense

• Good fit: Only if a local emergency management official, fire-rescue commander, or other qualified responder specifically instructs you to do so for a controlled reason. In that rare case, follow their exact guidance rather than general assumptions.
• Good fit: As a brief pre-storm ventilation step before severe weather arrives, while you are still safely at home and not in an evacuation zone. Once winds strengthen or warnings are issued, you should close and secure windows instead.

When You Should Avoid It

• Warning sign: Once a tropical-storm or hurricane watch or warning is in effect, cracking windows becomes risky. Openings can admit powerful wind, flying debris, and torrential rain, which may damage interiors and weaken the building envelope.
• Warning sign: If you live in a coastal or windborne-debris region, a mobile home, or any structure without rated impact-resistant coverings. In these settings, even a small opening can increase pressure differences and structural failure risk.

Pros and Cons

Pros

• Some homeowners believe it may reduce indoor pressure or provide ventilation, especially in older buildings where heat and humidity build up before a storm.
• Opening windows briefly before a storm can help air out rooms if you are doing last-minute storm prep and plan to leave the residence entirely.

Cons

• Modern building science and emergency guidance generally reject the pressure-equalization theory; an open window is more likely to let wind inside and damage walls, ceilings, and the roof structure.
• Open windows create entry points for wind-driven debris and heavy rain, leading to water damage, mold, destroyed belongings, and personal injury from shattered glass.

Decision Checklist

• Have I checked the latest guidance from my local emergency management agency or the National Hurricane Center, rather than relying on informal advice?
• Do I have proper window protection available, such as plywood, metal shutters, fabric screens, or impact-resistant windows rated for the wind zone?
• Is my plan to shelter in an interior room away from windows and exterior doors, and am I prepared to evacuate if authorities issue an order?

Alternatives to Consider

The safest approach is to keep windows and doors closed and protected throughout the storm. Install code-compliant hurricane shutters or impact-resistant laminated glass, or board up openings with properly anchored plywood before the storm arrives. If you are in an evacuation zone or a vulnerable structure such as a mobile home, leaving early is usually the best alternative. During the storm, move to a small interior room, closet, or hallway on the lowest level of the building and stay away from glass.

Final Recommendation

For most people, the answer is no: do not crack your windows during a hurricane. The pressure-equalization theory is largely considered a myth by emergency management professionals, and opening windows tends to increase risk rather than reduce it. The best course is to close and protect all windows, follow local evacuation and shelter-in-place orders, and rely on qualified emergency officials for high-stakes decisions. If you are unsure about your home’s readiness or your specific zone, contact your local emergency management office before storm season.