Lava spews out of the Eyjafjallajokull volcano in Iceland on March 21. The small volcano eruption that forced more than 600 people to flee their homes in Iceland over the weekend could set off a larger volcano.
The potential eruption of Iceland's volcano Katla would likely send the world, including the USA, into an extended deep freeze.
"When Katla went off in the 1700s, the USA suffered a very cold winter," says Gary Hufford, a scientist with the Alaska Region of the National Weather Service. "To the point, the Mississippi River froze just north of New Orleans and the East Coast, especially New England, had an extremely cold winter.
"Depending on a new eruption, Katla could cause some serious weather changes."
"When volcanic ash reaches the stratosphere, it remains for a long time," reports Hufford. "The ash becomes a very effective block of the incoming solar radiation, thus cooling the atmosphere's temperatures." -- Read more at USA Today