Air moves from areas of high atmospheric pressure to areas of lower pressure. In an area of high pressure, the air molecules are closer together than they are in an area of lower pressure. Air molecules tend to move from high to low pressure, and it is this movement of air that we feel as wind. The greater the difference tween the two pressures, the stronger the wind will be.
Avalanches are a major, unrecognized, weather-related hazard.
In parts of the Midwest, it was so dry that during thunderstorms rain evaporated before reaching the ground, and lightning set fire to people's lawns. The first series of shocks lasted 6 or 7 minutes. The city was virtually leveled. Over 60,000 people died. The quake was felt as far away as Sweden and the giant tsunami wave it generated swept much of the North Atlantic, with waves of twelve feet striking the West Indies.