Major North American mountain system and the continent’s eastern Cordillera
The National Park Service has issued an extreme heat watch for the Grand Canyon’s inner canyon, predicting 105–110+ degree conditions at the bottom. Officials are urging hikers to avoid mid-day trails as several heat-related incidents have already occurred, with fatalities reported on Kaibab trails. Fire danger is rising nearby amid dry conditions.
The FAA has moved to replace its 1973 ban on overland supersonic flights with new, noise-based standards. Initial proposals could allow faster cross-country travel and reduce flight times, while NASA tests aim to refine how sonic booms are perceived. Final rules are targeted for mid-2027.
The Interior Department has finalized rules that require individualized protection plans for species added to the threatened list and mandate economic analyses for critical habitat. Critics warn the move could hamper wildlife recovery, while supporters say it balances conservation with development. Several species, including monarch butterflies and the grizzly bear, are cited in ongoing debates.
A series of reports shows Colorado marmots fattening up for winter as Fat Marmot Week launches to raise funds for long-running marmot research amid federal funding cuts. Last winter’s low snowpack increased marmot deaths and shifting social dynamics are visible in alpine colonies across the region.
Multiple riders have been injured on alpine roller coasters in the U.S. and Europe. Reports detail a rider being airlifted after a park incident in Madrid, another being dragged along a track in Copper Mountain, and a Texas traveller sustaining serious injuries at Copper Mountain. Authorities are investigating the incidents and parks have closed pending safety reviews.