A river running through a canyon surrounded by mountains

Photo by Megan Clark on Unsplash

Flash Flood Shows Water Still Shaping Grand Canyon

natureNov 2, 2026·377 words·3 min read

On 29 August 2026, heavy monsoon rains sent a flash flood surging through Bright Angel Canyon, a side canyon of the Grand Canyon in Arizona, United States. By 2 September, according to the National Park Service, two bodies had been recovered, and more than 60 people had been airlifted out of the area around Bright Angel Creek. The torrent of brown water swept trees, rocks and mud into the Colorado River, washing away several footbridges and damaging about 40% of the only water pipeline serving the national park.

The Grand Canyon is 277 miles (446 kilometres) long and more than a mile deep. Its rock walls show almost two billion years of Earth's history. First, layers of rock formed. Then the land was pushed up. About five to six million years ago, the Colorado River started to cut down into the rock. Erosion — the slow wearing away of rock — made the canyon wider. Many plants grow there, and Native Americans have lived in the area for thousands of years.

Geologist Laura Crossey told KJZZ radio that floods happen in the canyon almost every year. But KJZZ said this flood was different. The rain fell on land burned by a fire in 2025, and the soil could not hold the water. The flood also hit bridges, a campground and a water pipeline. Park hotels stopped taking guests because the pipeline was damaged. River guides say floods often change the river.

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