• Air pressure inside can be 10 percent lower than outside. . .
• . . . but houses have openings other than windows that will relieve pressure differences.
• Winds as low as 60 mph can lift roofs that aren't well attached . . .
• Flying debris often breaks windows, allowing wind inside to push up on the roof and out on the walls.
• If wind rips off the roof, the walls often fall outward, leading to the mistaken impression that air pressure had "exploded" the building.

MYTH:	WINDOWS SHOULD ALWAYS BE OPENED TO EQUALIZE PRESSURE.
FACT:	Opening windows to equalize pressure during a tornado is ineffective in reducing damage. Don't worry about the windows; worry about protecting yourself. Also, flying glass is a real hazard.
MYTH:	MOBILE HOMES ARE SAFE IF THEY ARE TIED DOWN.
FACT:	A mobile home is never safe in a violent windstorm; such as a tornado. If you're in a mobile home when a tornado watch is announced, leave and go immediately to a safe structure, or be prepared to take cover in a low area, covering your head and the back of your neck. Remember: If you are in a ditch or ravine, be alert for flash floods that often accompany tornadoes.
MYTH:	YOU CAN OUTRUN A TORNADO IN A CAR.
FACT:	Don't bet your life on it. A tornado is unpredictable; you can't know which way it's going to go, or how fast. If you're in a car and a tornado is near, get away from the car and lie in a ditch or low area, protecting your head with your hands.
MYTH:	THE BEST PLACE TO BE DURING A TORNADO IS IN THE SOUTHWEST CORNER OF A BUILDING.
FACT:	The southwest corner is no safer than any other part of the building. The safest place is to be in a basement under something sturdy, like a workbench. If there is no basement, seek shelter in a small interior room in the middle of the building, like a closet or a bathroom. Always stay away from outside walls and windows