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.
Marmots that survived last winter are fattening up for winter as Fat Marmot Week begins, raising donations for long-running marmot research amid federal budget cuts. Scant snowfall and warm temperatures last winter have driven deaths in some Colorado marmot populations, prompting researchers to highlight climate-change risks.