Mar 8, 2013 — Why do people in Boston get the flu when it's cold, while people in Senegal get sick when it's hot? Humidity is a big part of the explanation. But how flu spreads in the tropics and more temperate climates appears to be different.
Jul 17, 2012 — "Moderate to extreme" drought conditions already exist in about 55 percent of the continental U.S. No relief is in sight. There are warnings this could be one of the 10-most expensive weather disasters in U.S. history.
Feb 14, 2014 — This winter's extra-cold temperatures mean that nearly 90 percent of the five lakes' total surface area is covered with ice. That's approaching the record high of nearly 95 percent, set in February 1979. Satellite images help tell the story.