In these cases, excessive sweating is known as hyperhidrosis ... people will sweat if their blood glucose drops, such as an early warning sign of stress or strain," Djavaherian said.

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An excessive heat warning is in place for much of Arizona and California, and southern areas of Nevada and Utah. People are being told to stay in air-conditioned areas and out of the sun.

In Canada, the provinces of New Brunswick, Nova Scotia, Ontario and Quebec are also under heat warnings, and officials are warning of "dangerously hot and humid conditions". People in the affected ...

So, when these avid hikers learned Phoenix's Park and Recreation board recently approved temporary closures at South Mountain during excessive ... additional warning signs, park rangers and ...