ENVIRONMENT
07/17/2013 08:29 am ET

5 Things To Know About The Heat Wave

AP

PHILADELPHIA  -- The first big heat wave of the summer is here, bearing down on all parts of the U.S., following temperatures that blistered the West Coast in June. Typically heat waves occur twice every summer. Meteorology director Jeff Masters of Weather Underground says expect the current bout of oppressive heat to last a bit longer than the usual three days. Look for relief by Saturday.

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