Severe thunderstorm watches and warnings were issued across the US Midwest from September 1 to 29, 2026, with extended alerts on September 1–2 for Nebraska and Minnesota, and critical weather on September 28–29 in North Dakota including a flood advisory and severe thunderstorm warning. The September 29 alerts indicated ongoing severe weather in Stutsman, Mercer, and Dunn counties.
Air quality alerts were issued in Washington state on August 28 and in Malaysia's Sarawak state by August 31, with the latter reaching hazardous levels (API over 400) due to Indonesian wildfires. A separate report from September 27 issued an ozone action day for Dallas-Fort Worth.
Between August 21 and September 2, 2026, the National Weather Service issued multiple Heat Advisories across Idaho, Tennessee, Georgia, and West Virginia, with heat index values reaching 105–107°F and temperatures up to 95°F expected.
The U.S. National Weather Service issued Extreme Heat Warnings across northern Arizona from August 1 to August 4, 2026, with dangerously high temperatures ranging from 103 to 118 degrees Fahrenheit. Affected regions included Gila, Yavapai, Yuma, and La Paz counties, as well as tourist destinations like the Grand Canyon, Sedona, and Page.
Between 2026-08-01 and 2026-08-02, the National Weather Service issued extreme heat warnings for Southern California and hazardous seas warnings for coastal Oregon and Northern California. Antelope Valley temperatures reached 105–112°F, while coastal waters faced gale-force winds to 45 knots and seas of 10–15 feet through August 4.