(AP) — A shortage of jet fuel, coupled with supply chain issues and urgent demand from firefighting aircraft, continues to cause problems at airports around the West.

In Nevada, state and federal lawmakers said they are investigating a possible shortage of jet fuel that could delay cargo delivery and passenger travel at Reno-Tahoe International Airport in the coming days. A spike in demand for jet fuel both by commercial airlines and from firefighting aircraft in Montana and the Pacific Northwest led to departure problems and daylong flight delays recently at Bozeman Yellowstone International Airport.

In California, recent flights in and out of Fresno Yosemite International Airport were disrupted by jet fuel shortages blamed on the lack of tanker truck driver deliveries.