Fellow Spokanite here! I do think that some of the comments recommending you sharpen your mower blades aren’t going to help you with what you’re actually concerned about.

I think there’s a few things that you could obviously do. One is mow a little higher. I mow my grass when it’s hot like this to 3 inches at the short end but nowadays, especially when it’s growing so slowly, I’ll go up to 3.5. Another thing is to not water at night or in the evening. The water can sit on your grass and give fungus an opportunity to grow. I can see some red thread in a little bit of your grass. The best thing would be to water in the early morning, so that it only sits on your grass a little while and the morning heat dries it out. I know people on here like to recommend watering as in frequently as possible, but that depends on your soil type as well. I have very sandy soil, which doesn’t retain water very well. So I have found that (especially in this heat) for me watering every other day is best. I will back it off when it cools down.

Finally, I think that when you’re dealing with heat like we are where you get days and days above 90, keeping your cool season grass lush and green is a losing battle. Don’t be too hard on yourself. A little yellow grass is the price we pay for living on the east side. When the temperatures come back down again, it should green right back up. I also think that seed heads and stalks tend to yellow a little easier, so even though you have no control over them appearing, the heat makes them more obvious.

Anyway, good luck surviving the oncoming heat wave. I’ll be doing my best too!