agreed, the bigger issue is warm water. Temps are 5 F warmer than usual. Anglers need to carry thermometers and use them this summer.
The science shows that steelhead actively avoid water temperatures above 66 F. Anything above this is increasingly stressful. From an angling perspective, the fish aren't as grabby and fight poorly. I fish a pointless waker (no hook) at 66-67 F, and quit altogether at 68 F.
If you gotta fish, there is trout fishing for small resident cutties in tributary creeks high above the valley floor that stay cooler, where some driving and exploring with little 3-4 wt can be fun. Avoid tribs near the mainstem and/or below barriers to anadromy, several of which are closed anyway, to protect salmon and steelhead smolts.