Flagstaff, AZ – Visitors and hikers in the Grand Canyon are facing dangerous temperatures this week as an Extreme Heat Warning remains in effect for all areas below 4,000 feet elevation through 7 p.m. MST Tuesday.
According to the National Weather Service Flagstaff, the warning extension comes as hot daytime highs persist with little relief in sight. Forecasts show lower elevations of the canyon, including Phantom Ranch and Havasupai Gardens, will see daily highs between 111°F and 113°F through Monday. The Cottonwood Campground is also expected to approach 99°F, while higher-elevation spots such as the North Kaibab Trailhead will be cooler but still warm, with highs around 83°F.
Much of the region is forecast to remain dry, although there is a modest chance for isolated showers and thunderstorms, especially in the White Mountains and along the Mogollon Rim. Storms are expected to be high-based and produce generally light rainfall, offering little cooling relief.
Officials urge visitors to take extreme precautions, including staying hydrated, avoiding strenuous activity during peak heat hours, and monitoring for signs of heat-related illness. Rangers remind all hikers and campers that conditions inside the canyon can be significantly more severe than at the rim, and even short hikes can become dangerous.
The National Park Service and the National Weather Service both advise adjusting plans if possible, emphasizing that temperatures in the canyon bottom will be well above average for early August. Heat-related emergencies are common in this environment, particularly among those unprepared for the rapid elevation and temperature changes.
The Extreme Heat Warning will remain in place for all Grand Canyon locations below 4,000 feet elevation through Tuesday, as temperatures are expected to remain at or near record highs.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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