CNN
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High temperatures affect public health across wide swaths of the United States each summer, causing spikes in emergency room visits and hundreds of heat-related deaths. As temperatures rise, CNN is tracking extreme heat conditions and the potential risk for Americans each day.
To help prepare Americans for the dangerous temperatures, the National Weather Service and the US Centers for Disease Control and Prevention has a national forecast predicting heat-related risks.
It considers the severity and unusualness of forecast heat and its potential duration, while also factoring the likely impact on residents in specific locations based on CDC data for past effects,…
