A fatal flash flood occurred at the Grand Canyon, resulting in one confirmed death and leaving approximately fifteen tourists unaccounted for. The dangerous floods swept through the area, prompting an urgent search and rescue operation. Authorities are actively searching for the missing individuals amidst challenging conditions. NBC News correspondent Dana Griffin is reporting from the scene, providing updates on the ongoing rescue efforts. Further thunderstorms are forecast, raising concerns about the potential for additional flooding. TODAY’s Dylan Dreyer is monitoring the developing weather system and its impact on the search. The National Park Service is advising visitors to avoid hiking in slot canyons due to the increased risk of flash floods.