Heat Dome covers 1 million square miles across USA

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" This heat is dangerous on many levels, " NWS Director Jack said in a

statement. " Temperatures and humidity levels are high, the heat will be

prolonged, and very warm temperatures overnight won't provide any respite. All

of these factors make this an unhealthy situation, especially those in the upper

Midwest who are not accustomed to such heat. " ...

At least 27 states were under some sort of heat warning, watch or advisory...

http://www.msnbc.msn.com/id/43820802/