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DES MOINES, Iowa (AP) — Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling temperatures and uncomfortable humidity to millions.

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The first full week of summer will also bring with it New York's first heat wave with a heat dome settling over the Northeast on Sunday and bringing humidity and possible triple-digit temperatures.

This dome of hot air will produce temperatures above 90° starting Sunday and continuing into the week. As temperatures rise, they could get close to breaking record highs for the region.

By ISABELLA O’MALLEY, Associated Press Summer will make a dramatic entrance in the U.S. 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. The soupy conditions will stretch into next week ...

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.

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.