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: 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. 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").
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- Robinson, Peter J. (April 2001). "On the Definition of a Heat Wave". Journal of Applied Meteorology. American Meteorological Society. 40 (4): 762–775. Bibcode:2001JApMe..40..762R. doi:10.1175/1520-0450(2001)040<0762:OTDOAH>2.0.CO;2. S2CID 120624665. Archived from the original on 2006-05-07. Retrieved 2007-12-30.
- FEMA: Extreme Heat
- Hot Weather Tips Archived 2006-06-21 at the Wayback Machine
- Marble Bar heatwave, 1923-1924 Archived 2009-03-17 at Pandora Archive