Definition: Swelters are a type of weather phenomenon that occurs when warm, humid air rises and cools down rapidly, causing it to become saturated with water vapor. This process can lead to the formation of clouds or precipitation, which can be in the form of rain, snow, sleet, or hail. In general, swelters occur during periods of high humidity, typically during the summer months when temperatures reach a comfortable level and there is ample moisture available for evaporation. Swelters are often associated with
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