The dangerous heat dome buckled roads in Chicago, killed thousands of cattle in Kansas and contributed to the death of a 5-year-old in Houston, who was left in a hot car. The frequency of heat waves is setting off a new federal framework to protect workers from heat exposure, and researchers are looking into future public health strategies. » Subscribe to NBC News: nbcnews.to/SubscribeToNBC
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Dangerous Heat Wave Sets In Across The U.S.