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USA Heat Dome: Millions Under Extreme Warnings
26 Jul
Summary
- Millions face extreme heat warnings across central and southern US.
- Heat indices are forecast to exceed 105 degrees Fahrenheit.
- The heat dome phenomenon is trapping high temperatures.
- The continental U.S. had the second-hottest first half of 2026.
Extreme heat warnings are affecting tens of millions in the central and southern United States as a persistent heat dome intensifies high temperatures and humidity for a second consecutive day. Heat indices are projected to exceed 105 degrees Fahrenheit from Memphis to Montana, with the southwest anticipating temperatures as high as 120 degrees Fahrenheit.
This atmospheric phenomenon, which traps heat, is expected to remain stationary for the current week, offering little immediate relief. While some temporary respite might appear in the central U.S. toward next weekend, its duration remains uncertain.
Authorities are urging caution, particularly for children, older adults, and individuals with pre-existing medical conditions, who are at elevated risk for heat-related illnesses. Seeking air-conditioned spaces, staying hydrated, and limiting sun exposure are critical preventive measures. Notably, the continental U.S. endured the second-hottest first half of the year on record in 2026.
