A sudden and powerful flash flood struck the Grand Canyon National Park following heavy monsoon rains, resulting in two confirmed fatalities and one person still missing. The incident occurred as intense rainfall overwhelmed hikers in a remote area of the canyon. Rescue efforts were immediately launched, involving park rangers and emergency responders, but were hampered by the dangerous conditions and challenging terrain. Dozens were initially reported missing, but many have since been accounted for. Authorities are continuing the search for the remaining missing hiker, emphasizing the risks associated with hiking in slot canyons during monsoon season. Park officials are urging visitors to exercise extreme caution and heed all warnings regarding potential flooding.