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The NWS warning was in effect for regions of the Grand Canyon below 4,000 feet elevation. Temperatures were forecast to potentially reach 110 degrees at Phantom Ranch and 102 at Havasupai Gardens.
Six tornadoes were reported from Wisconsin to Indiana on Wednesday, with the Wisconsin ones labeled as “large,” though no major damage or injuries have been reported.
The NPS recommends avoiding hiking the Grand Canyon's inner trails between 10 a.m. and 4 p.m., when temperatures are at their peak. Temperatures in the inner canyon can reach over 120 degrees Fahrenheit in the shade, creating "extremely hazardous conditions for hikers," the NPS said.
After a 67-year-old hiker dies in the Grand Canyon, authorities warns of heat-related illness due to daytime temperatures in excess of 120°F
Climate change-fueled extreme heat will significantly increase the risk of heat-related illness for the millions of people who visit Grand Canyon National Park each year, a new National Park ...