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A definition based on the Heat Wave Duration Index is that a heat wave occurs when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5 °C (9 °F), the normal period being 1961–1990. The same definition is used by the World Meteorological Organization.
Heatwaves are prolonged periods of abnormally high temperatures that can cause serious health and social impacts. Learn about the causes, effects, prevention and response to heatwaves from WHO data, guidelines and resources.
A heatwave is a period of time when the weather is much hotter than usual. Learn more about the meaning, pronunciation and usage of this word with examples from different sources.
30 de abr. de 2024 · A heat wave is a period of unusually hot weather that lasts two or more days and is outside the historical averages for a given area. Learn how heat waves form, why they are dangerous and how to stay safe during them.
heat wave, period of prolonged abnormally high surface temperatures relative to those normally expected. Heat waves may span several days to several weeks and are significant causes of weather-related mortality, affecting developed and developing countries alike.
A heatwave can be defined as a period where local excess heat accumulates over a sequence of unusually hot days and nights. Heatwaves amplify many risks, such as health-related or economic risks, including increased human mortality, drought and water quality, wildfire and smoke, power shortages and agricultural losses.
30 de jun. de 2023 · Heat waves begin when high pressure in the atmosphere moves in and pushes warm air toward the ground. That air warms up further as it is compressed, and we begin to...
