Extreme heat can persist for days or weeks due to a specific weather pattern. This pattern is characterized by a strong system that settles over an area, causing air to sink and warm. As a result, temperatures increase over time.

Normally, warm air rising helps to create cooler conditions, but this process is suppressed in such cases. The suppression of cloud formation and rainfall also contributes to the heat.

Further information on this weather phenomenon is available, explaining how it forms and the effects of high pressure on temperatures and precipitation.