A heat dome impacting over 100 million people in the US will create dangerous conditions as it moves eastward. Heat advisories are issued across the northeastern coast, forecasting heat index levels 10 to 15F above average. Thunderstorms may provide temporary relief in the northeast, but heat and humidity will worsen in the southeast and Tennessee Valley. Significant health risks arise from high heat indices, especially for vulnerable groups lacking cooling access. The prolonged heat wave raises concerns for outdoor workers, older adults, and those with pre-existing health concerns, highlighting the dangers of extreme weather phenomena.
More than 100 million people in the US will face dangerous conditions this weekend as a heat dome scorches much of the country, nudging eastward. Heat advisories are in effect across the northeastern coast, with daytime heat index temperatures 10 to 15F above average. Severe thunderstorms are expected to break the heat in the northeast, but heat and humidity will intensify in the southeast and Tennessee Valley. Dangerous heat indices exceeding 115F pose serious health risks, especially for vulnerable populations without adequate cooling or hydration.
The heat index reflects the temperature's feel when humidity is considered, with New York City predicting a sweltering 106F, slightly higher than Phoenix, Arizona. This long-duration heat wave threatens health due to high temperatures and humidity, increasing risks of heat exhaustion and illness especially for the young, elderly, and those with health conditions. Outdoor workers, the unhoused, and those with substance use issues are particularly vulnerable, highlighting the impact of the extreme weather conditions.
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