Asia

In Singapore, a heat wave is defined as occurring when the average daily maximum temperature is at least 35 °C for three consecutive days, and the average daily mean temperature throughout the period is at least 29 °C.

Europe

Denmark defines a national heat wave (hedebølge) as a period of at least 3 consecutive days in which the average maximum temperature across more than half the country exceeds 28 °C. The Danish Meteorological Institute

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