Definition

An extended period of uncharacteristic hot weather for a given place and time.

Further reading
Heatwave - World Meteorological Organization (WMO) [website]
Heatwaves - World Health Organization (WHO) [website]
Related

extreme heat; heat exhaustion; heat illnesses; heat index; heat stress; heat waves; heatwave events; heat-related illnesses; heat stroke; high pressure; hot weather; urban heat island effect (UHI effect); wet bulb globe temperature (WBGT); wildfires

See also
Air Conditioning (AC)
Climate change
Droughts
Extreme weather
Heat-related illnesses
Marine heatwaves
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Health Impacts
Drafted by
Chris Graham
Reviewed by
TBC