This evening we have some T-storms coming through the area today, with a bit cooler temps behind the front. The rain should be a good thing to cool the rivers, and unless there is a huge localized downpour, I would expect all rivers to remain at fishable levels, but again, check those temps before fishing.
The still water Hex hatch has been really strong when conditions are right. Thursday through Saturday I was at our families camp up north and the fishing was great on Thursday and Friday night. As you can see in the photo gallery, we landed some big Rainbows and Browns. We hit the water around 7:30 and initially fished Hex nymphs on a sink tip line. Letting the fly sink and slowly stripping it back in produced a few fish before the bugs really started emerging in any numbers, or the fish began eating on top. Around 8:30 the fish were keying in on duns and with so many flies on the water, you could accurately predict which direction the fish were moving. The lower than normal surface temp on the pond also helped, as the fish were staying at the surface. Fish were confidently eating our flies when we could get them within range. My wife landed her largest ever VT Trout right at dark, and it was quite a struggle to get it in the net with no light. Saturday was a different story, as some rain and wind really killed the hatch and there were only a few fish eating emergers and mostly ignoring the duns. We had one break us off and my uncle missed a couple. That is usually how the hex hatch goes, hit or a big miss, but when you hit it right, it's so fun.
I'll be in Oregon and Idaho on a fly fishing road trip with my brother for a week. Hopefully we will get into some good fishing, though they have had a huge heat wave with temps in the 100's. Ill get a report up on my trip when I return.
Good luck on the water!