The recent closure of a California oil refinery — and plans to shutter another in the near future — have some experts warning of potential fuel shortages and price spikes in Nevada and other Western states that depend on the Golden State. California supplies roughly 88% of Nevada’s fuel, including diesel and jet fuel. But Phillips 66 closed a refinery in the Los Angeles area in October, and earlier this year, Valero submitted a notice that it plans to close a Bay Area refinery by April 2026. Combined, the two refineries produce 284,000 barrels of oil per day, about 17%...