Grand Canyon National Park officials will shut off water service in the inner canyon for a week as crews work on the Transcanyon Waterline and the Havasupai Gardens pumphouse.

On today's newscast: June fire outlook shows high wildfire risk, plans to update North Rim water systems move forward, meteorologist Lee Born with the weekend weather forecast, and more.

High summer temperatures make Flagstaff’s thin air feel even thinner. Density altitude affects your body, turning a simple mountain hike into a tough physical workout.

On today's newscast: Mohave County resident dies from hantavirus, Flagstaff mom charged with infant's murder pleads not guilty, Katie Hobbs completes visits to Arizona's 22 tribal nations, and more.

Health officials in Mohave County say a resident has died from the sin nombre strain of hantavirus.

The estimate pops up again and again in reporting on the West’s most important waterway, but one researcher thinks it might be slightly high. That might point to a bigger problem.

A Conservation K-9 named Blue will help reduce human-wildlife encounters in busy areas of the South Rim in Grand Canyon National Park.

On today's newscast: Researchers question Colorado River use data, authorities investigating Cathedral Rock vandalism, Grand Canyon adds conservation K-9 to reduce human-wildlife conflicts, and more.

On today's newscast: No new measles cases in Mohave County outbreak, two Colt Grill employees plead guilty following ICE raid, Grand Canyon water system to get a major upgrade, and more.

On investigative travels and assignments, author Scott Thybony is no longer surprised by the unexpected questions — and answers — he gets. Thybony remembers some surprising interactions he’s had along the way in this month’s Canyon Commentary.