A heat dome that has brought consistent triple-digit temperatures to a large swath of the southwestern United States since June will increase in size and intensity over the next week or so, bringing record-setting heat to millions more, according to AccuWeather forecasters.
In the interim, the Desert Southwest will continue to roast through the end of the week and into the weekend, with Phoenix adding to its record-setting streak of high temperatures at or above 110 degrees. After that, the Rockies and much of the central U.S., which have experienced only intermittent hot spells this summer, will bake under more consistent heat into next week.
