Bright Angel Canyon, the scene of flash floods, center right, merges with the Colorado River in the Grand Canyon, Monday, Aug. 31, 2026, at Grand Canyon National Park, Ariz. (AP Photo/John Locher)

People stand at the rim of the Grand Canyon, Monday, Aug. 31, 2026, in Grand Canyon National Park, Ariz. (AP Photo/John Locher)

Buildings are seen in a flood damaged Bright Angel Canyon the Grand Canyon, Monday, Aug. 31, 2026, in Grand Canyon National Park, Ariz. (AP Photo/John Locher)

In this image taken from video provided by KFOR, authorities work the scene of a building explosion in Sand Springs, Okla., Thursday, Aug. 27, 2026. (KFOR via AP)

Pallbearers carry the coffin of Taras Didych, head of the Dmytrivska community in Kyiv region, who was killed while going to help local residents following a Russian drone attack during his funeral in Myla, on the outskirts of Kyiv, Monday, Aug. 31, 2026. (AP Photo/Francisco Seco)

Relatives mourn Taras Didych, head of the Dmytrivska community in Kyiv region, who was killed while going to help local residents following a Russian drone attack during his funeral in Myla, on the outskirts of Kyiv, Monday, Aug. 31, 2026. (AP Photo/Francisco Seco)

In this photo provided by the Ukrainian Emergency Service, a woman looks at a residential building damaged by a Russian air strike in Sloviansk, Donetsk region, Ukraine, Monday, Aug. 31, 2026. (Ukrainian Emergency Service via AP)

In this photo provided by the Ukrainian Emergency Service, emergency services personnel work to extinguish a fire following a Russian guided bomb strike in the city center of Sloviansk, Donetsk region, Ukraine, Monday, Aug. 31, 2026. (Ukrainian Emergency Service via AP)