Likewise, early exits from the World Cup don't cause a lot of people in the U.S. to get too hot and bothered.

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"It's still too hot to get in there, " says a spokeswoman for the Bureau of Alcohol, Tobacco and Firearms.

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If you get too hot, you start to sweat.

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There are a couple of hot pools and a cold one, too - just to get the heart going - so it is best to stick a toe in before doing your cannonball.

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