Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling heat and uncomfortable humidity to millions. The heat will be particularly worrisome this ...

Summer will make a dramatic entrance across America this week with a heat dome that will bring stifling temperatures and uncomfortable humidity to millions.

Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling heat and uncomfortable humidity to millions.

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Heat waves are primarily caused by high-pressure systems that push warm air down onto an area and hold it there. During heat ...

A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir that traps heat and humidity, said Ricky Castro, a National Weather Service meteorologist in Illinois.

Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling heat and uncomfortable humidity to millions. The soupy conditions will stretch into next week ...

Millions across the United States are bracing for a dramatic start to summer this week, as a powerful 'heat dome' is set to engulf vast swathes of the country, bringing with it stifling temperatures ...

A Midwest heat dome will bring worryingly high temperatures and stifling humidity to millions of people this weekend.

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A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir that traps heat and humidity, said Ricky Castro, a National Weather Service meteorologist in Illinois.