This story was originally published by The Guardian and is reproduced here as part of the Climate Desk collaboration.
A deadly flash flood in the Grand Canyon over the weekend was probably driven by a confluence of climate factors, including drought, wildfire scarring and warming temperatures in the Pacific Ocean that can supercharge storms.
At least two people have died, nearly 80 people were rescued and one remained unaccounted for after a surge of water and debris swept through the immensely popular tourist destination on Saturday, fueled by torrents of rain that hit the national park’s Bright Angel Creek area.
Flash floods are not uncommon in the region, especially during the monsoon season from June to September, when strong rains pummel the arid landscapes and can quickly fill narrow rock formations. Visiting the Grand Canyon — a crown jewel of the US national park system — can be particularly dangerous in the summer because of the risk of flash flooding, when clear days can give way quickly to thunderstorms and downpours.
The steep, rocky nature of the canyon itself funnels water rapidly, transforming downpours into a charging wall of water.
