Are you sure that isn't winter rye? Winter rye will die out soon, so you could try letting it go. But if it is fescue read on...
We talk here about deep infrequent watering to develop deep roots to withstand the summer heat. You might do just the opposite. You might try shallow frequent watering. You might try watering 10 minutes a day for a week and then no water for 2 weeks. The bermuda IS going to live. Whether this will kill the fescue, I don't really know. I do know that shallow rooted fescue will not live through a hot summer unless it is really babied. By watering frequently for a short time, and then denying water, you are stressing those plants, including the bermuda. But again, the bermuda WILL live.
Another thing that fescue doesn't like is a lot of nitrogen in the summer heat. You might try some soy or corn gluten meal at 20-30 pounds per 1,000 square feet on the 4th of July. You'll have to water that just enough to wet it down, but you're not trying to dissolve it or anything.
And the website where you keep your pictures tried to install spyware cookies from four different sites on my computer
. You might want to reconsider where you store your stuff.
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