Heat dome drives record-challenging temperatures across twelve U.S. states
A persistent high-pressure system is pushing extreme heat and humidity into twelve southern and mid-southern states, prompting heat advisories.
A powerful heat dome anchored over the South is generating dangerously high temperatures and humidity across a dozen states, leading the National Weather Service to place heat advisories in effect from Wednesday. The Weather Prediction Center predicts highs in the upper 90s to low 100s from the Southern Plains to the lower Mississippi Valley, with localized heat-index readings up to 110 °F in areas such as eastern Oklahoma, northwestern Arkansas, southeastern Kansas, southern Missouri and northeastern Texas.
The system creates a marked temperature contrast, with the Central Plains and Midwest remaining in the upper 60s to low 70s. Experts explain that the dome traps warm air under a high-pressure lid, while high humidity hampers sweat evaporation, raising health risks. The CDC advises staying in air-conditioned spaces, staying hydrated, and checking on vulnerable populations. The hazardous heat is expected to persist as the front separating cooler northern air shifts northward.
Why it matters
Extreme heat threatens public health and can overwhelm communities across a large portion of the United States.
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