Heatwave
A Guide To Climate Change Impacts, On Scotland’s Historic Environment, published by Historic Environment Scotland in October 2019, defines a heatwave as: ‘An extended period of unusually high temperatures in a particular area.'
Climate Change 2021, The Physical Science Basis, published by the Intergovernmental Panel on Climate Change in 2021, defines a heatwave as: ‘A period of abnormally hot weather often defined with reference to a relative temperature threshold, lasting from two days to months. Heatwaves and warm spells have various and, in some cases, overlapping definitions.’
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