On 2/26/2012 3:33 PM, Oren wrote:
On Sun, 26 Feb 2012 04:48:41 -0600,
wrote:

In a hurricane, roofs don't blow off houses
as much as they are popped off like a champaign cork by internal pressure.

Exactly! Folks that seal up the home .. yikes .. hurricane.

The barometric (falls ?) pressure drops, creates a vortex in the home.
Then it lifts the entire roof off and drops in the back yard. Or
against the neighbor's garage door.

Avoid the pressure build up in the home during the storm. Partially
open a window on the leeward side of the house. The pressure
escapes..

UL. http://www.snopes.com/science/hurricane.asp

There's a similar old wive's tale about tornadoes.