Heat wave

prolonged period of excessively hot weather

A heat wave is a period of unusually warm or very hot weather, and may be accompanied by high humidity. "Heat wave" is not an exact term:[1] Any weather that feels warmer than people expect, might be called a heat wave. For example, temperatures normal for a warmer climate might be called a "heat wave" by people living in a place that is usually cooler.[2] So a "heat wave" could mean a little warm weather, (like "several days as hot as summer, but in winter"), or temperatures so high they make history, (such as, "the hottest summer in a hundred years").

Temperature difference in Europe from the average during a heat wave in 2003.


  1. Meehl, George A. (August 13, 2004). "More Intense, More Frequent, and Longer Lasting Heat Waves in the 21st Century". Science. 305 (5686). Unknown parameter |coauthors= ignored (|author= suggested) (help)
  2. Robinson, Peter J. (April 2001). "On the Definition of a Heat Wave". Journal of Applied Meteorology. American Meteorological Society. 40 (4): 762–775. Archived from the original on 2006-05-07. Retrieved 2007-12-30.

Other websitesEdit