Texas Governor Greg Abbott declared a 30-day statewide disaster on September 28, 2026, citing record diesel prices and tight fuel supplies, with measures taking effect September 29 across all 254 counties. The order expands dyed, tax-exempt diesel use on Texas roads, suspends Texas Low Emission Diesel rules to federal minimums and raises allowable weight limits for fuel, agricultural and timber loads. Abbott also requested that the U.S. Environmental Protection Agency waive federal ultra-low-sulfur diesel requirements. The EPA said it would reconsider Texas air-quality regulations, including the 2015 ozone-designation nonattainment classification and the Biden-era rejection of Texas efforts to meet federal ozone standards under the Clean Air Act. EPA Administrator Lee Zeldin said the review would address concerns about economic harm and pollution originating outside Texas, while cautioning that its outcome had not been predetermined. Texas diesel averaged $5.86 per gallon, compared with a national average cited in the records of nearly $6.40 or $6.45; newer AAA figures said diesel cost roughly 84 cents a month earlier and about $2.76 a year earlier. Texas's 20-cent-per-gallon fuel tax remains in place. The developments come amid falling Brent crude, record diesel prices, pressure on refining capacity and wholesale margins, and a Senate debate over a proposal to embargo diesel exports. The White House denied plans for a 90-day export ban.