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Amber Sullins reports on extreme heat and monsoon moisture returning to the Phoenix area.

Chief Meteorologist Amber Sullins reported that an intense heat dome is bringing dangerous temperatures to the Southwest, with an Extreme Heat Warning in effect for Phoenix through Tuesday. Temperatures in the Valley are expected to reach highs of 110 to 116 degrees, while overnight lows remain in the 80s and 90s, making it difficult for the region to cool down. Research from Arizona State University identifies urban heat islands and overnight heat transport as key factors in rising temperatures. Meanwhile, monsoon moisture is returning to the region, with storms expected in southeastern Arizona. A Gulf surge of low-level moisture is forecast to move up from Mexico late Monday night, increasing humidity and pushing heat index values higher by Tuesday. Weather officials advise residents to limit outdoor exposure between 10 a.m. and 6 p.m. and to stay hydrated. The heat dome also affects much of the West, with red flag warnings for increased fire risk in the Pacific Northwest, where wildfires are burning at a record pace.

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