Two people are dead and one person remains missing following deadly flash flooding at the Grand Canyon over the weekend, as rescuers brace for more treacherous weather, authorities said. ABC News' Trevor Ault reports. ▻ ↧ 2 dead, 1 missing after deadly Grand Canyon flash flood Two people have died and one person remains missing following deadly flash flooding at the Grand Canyon over the weekend as rescuers brace for more treacherous weather.