(Rio Yamat/ CTV News) — Scorching heat across the U.S. already has caused more than a dozen deaths in Texas alone and led to mounting misery for millions of people from the Pacific Northwest to the South.

And the official end of summer is still months away.

Here’s a guide on how to keep cool and stay safe in the punishing  …

(Laura McQuillan/ CBC News) — A few summers ago, Gordon Giesbrecht was doing work on a lakeside dock when he says he started feeling “a little funny.” Minutes later, he was vomiting — a symptom that he immediately recognized as heat exhaustion.

As an expert in how extreme temperatures affect human bodies, Giesbrecht  …