Dangerous heat and dry conditions fueling the White Sage Fire in Arizona have prompted authorities to expand evacuation zones to clear out the Grand Canyon.

A 63-year-old woman was found a quarter mile away from her vehicle. The investigation indicated she was returning to the trailhead when she collapsed.

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Hantavirus is primarily spread by deer mice, which are prevalent in the Grand Canyon area. The virus can cause a host of serious, even fatal, illnesses such as hantavirus pulmonary syndrome (HPS) and hemorrhagic fever with renal syndrome (HFRS), according to the Centers for Disease Control and Prevention ( CDC ).

The White Sage Fire was burning in Arizona bout 15 miles southeast of Fredonia in Coconino County and north of the Grand Canyon State Park.

Grand Canyon National Park reports a 67-year-old man's death on South Kaibab Trail amid sweltering temperatures, despite CPR attempts by passersby and park medical personnel.

Grand Canyon National Park officials say a 67-year-old man died Tuesday while hiking on the South Kaibab Trail.

A Coconino County, Arizona health official confirmed a case of Hantavirus at Grand Canyon National Park. Hantavirus is rare, but can be fatal, spread mostly by deer mice, rat urine, droppings, and saliva.