90 Million Americans Under Heat Alerts

21 states are nearing record highs this weekend with temperatures in the northeast expected to hit triple digits. The dangerous weather forcing Boston to postpone its triathlon while New York shortens its races scheduled for tomorrow. The death toll is also climbing, with officials in Louisiana announcing a police officer died on the job because of an unexpected heat-related medical event. This makes three heat-related deaths nationwide. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
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