Heat Dome Brings Triple-Digit Temperatures and Health Risks to the South.

A heat wave has been persisting across Texas for over a week, and is expected to expand across much of the South and parts of the Midwest this week, with hotter than average temperatures lasting into the beginning of July. Excessive heat watches, warnings, and advisories have been issued by the National Weather Service, and daily record highs may be broken in several states. The extreme heat is caused by a dome of high pressure aloft that has shifted northward into the Southern Plains. Climate change has made record heat in this Mexico-Texas heat wave at least five times more likely.