Extreme heat has caused five deaths at national parks so far this year, according to the National Park Service. The deaths come as the Northern Hemisphere is experiencing the hottest summer on record.

An avid New Jersey outdoor buff slipped off a trail and froze to death while hiking New York’s highest peak with her dog — after it took rescuers more than six hours to find her in bitter single-digit ...

The hiking trails surrounding Mt. Baldy reopened to visitors on Wednesday after being closed last week due to unsafe winter storm conditions and three deaths. Why were the trails closed? Officials ...

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