Recent Western U.S. heat waves, including triple-digit forecasts for early August 2026 across Nevada, Arizona, Utah, and parts of the northern plains, represent the main driver keeping the market tight. These conditions follow July's widespread record highs but remain concentrated in the West, where all-time marks at long-term stations are harder to break than daily records. Forecasters note variable ridge strength and potential cooling trends later in the month, which could limit total breaks to the 21-100 range or allow a surge above 100 if heat expands eastward. With only a few days elapsed and mixed long-range outlooks, traders see balanced odds across mid-tier buckets, hinging on whether persistent high pressure produces widespread new monthly or all-time peaks at dozens of stations.