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FILE - Trees line the Oiapoque River on the border between Brazil and French Guiana, in Oiapoque, Amapa state, Brazil, March 10, 2026. (AP Photo/Eraldo Peres, File)

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FILE - Brazil President Luiz Inacio Lula da Silva speaks during a news conference at the COP30 U.N. Climate Summit, Nov. 19, 2025, in Belem, Brazil. (AP Photo/Andre Penner, File)

The National Oceanic and Atmospheric Administration says the contiguous United States set a record for its hottest month ever in July. Last month averaged 76.89 degrees Fahrenheit across the Lower 48 states, eclipsing the Dust Bowl’s July 1936 by an eighth of a degree. Although it was unusually cool in Alaska, hotter than normal conditions blanketed the Lower 48, with the most excessive heat in the Mountain West, Southwest, Northern Plains and Southeast. The biggest driver of the heat was at night. Nighttime lows, which are crucial for people and agriculture to recover from hot days, smashed the old record for hottest minimums by 0.7 degrees, the NOAA said. Scientists say hotter nights are a sign of human-caused climate change.

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A bathtub ring of light minerals shows the high water line of Lake Mead near the Hoover Dam at the Lake Mead National Recreation Area Tuesday, June 30, 2026, near Boulder City, Nev. (AP Photo/John Locher)

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FILE - The sun is obscured by wildfire smoke as people stop to photograph the Washington Monument and Lincoln Memorial Reflecting Pool, July 17, 2026, on the National Mall in Washington. (AP Photo/Julia Demaree Nikhinson, File)

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FILE - Wildfire damage is visible in the immediate area surrounding Collins First Nation, a small, remote Ojibwa community in northwestern Ontario, July 22, 2026. (Chris Young/The Canadian Press via AP, File)

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A durian harvester searches for ripe fruit in an orchard at dusk in Karak, Pahang state, Malaysia, Tuesday, June 23, 2026. (AP Photo/Vincent Thian)