Heatwave (noun)

A prolonged period of excessively hot weather, often accompanied by high humidity, which is considered unusual or undesirable for a particular area.

Origin:

A combination of heat + wave, referring to a prolonged period of excessively hot weather.

Examples:

1. The heatwave was forecasted to last for several days.
2. The heatwave caused widespread power outages as demand for air conditioning surged.
3. Many cities issued heat advisories during the heatwave, warning residents to take precautions against heat exhaustion and dehydration.
4. The heatwave resulted in a significant increase in hospital admissions for heat-related illnesses.
5. The heatwave was a major factor in the decision to cancel outdoor events and close schools during the hottest part of the day.