What Is a Heat Dome?

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What Is a Heat Dome?
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Climate change has led to various weather phenomena in recent years. One of these is the increasing prevalence of heat domes. Learn more about heat domes:

A heat dome occurs when hot ocean air is trapped over a large area. High atmospheric pressure over the region pushes air down, causing it to heat up as it is compressed. This action causes the formation of a “lid” or “cap” that seals heat in the area and traps heat in the dome. The heat dome effect causes the area trapped in the dome to experience a tremendous rise in temperature.

Usually, the wind passing from west to east travels in a wavelike pattern, going north and then south and then north again. The change in air temperature causes the meandering to become more prominent, causing the air to move slower or even become stagnant. That strong, high-pressure atmospheric conditions cause heat domes to occur.A heat dome traps hot air in a large area in a dome-like manner.

Previous heat dome examples include one in the Chicago area in the summer of 1995 that caused an estimated 739 people to die over five days. In the summer of 2021, heat waves and heat domes affected the Northwest region of the United States and British Columbia. There were 100 heat-related deaths in Washington state alone. The extreme heat caused over 250 deaths in the U.S. and more than 400 in Canada.Due to climate change, more heat domes are likely to occur and last for a longer time.

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