The US National Weather Service said Sunday parts of the Southwest, Great Basin, and Central Rockies could encounter rain and thunderstorms through Monday, potentially leading to flash flooding in burn scars and steep terrain, due to monsoonal moisture.
The Central US will continue to experience heat early this week, while the Ohio Valley and Mid-Atlantic will likely be exposed to similar weather later this week.
The NWS early Monday issued a flash flood warning for parts of Arizona, including Parker, Wickenburg, Gilla Bend, Casa Grande, and Bensen, which are mainly served by Pinnacle West Capital (PNW) subsidiary Arizona Public Service.
The agency raised a red flag warning for some cities in Oregon, including Chemult, Crater Lake, Silver Lake, Paisley, Chiloquin, Bly, Klamath Falls, and Lakeview.
In California, a similar warning was issued for Tulelake, Macdoel, Happy Camp, Yreka, Fort Jones, Mount Shasta, Cedarville, Bieber, Canby, Alturas, and Likely.
PacifiCorp's Pacific Power serves as the primary service provider for the affected cities in both states.