I know you’re trying to be clever. . .
There’s not enough moisture here to keep grass alive, legal or otherwise.
Give it a rest.
You'd be surprised what native perennial bunch grasses can handle in the way of drought stress once they have a compliment of native forbs to prepare the soil.
I have sandy soil. It hasn't rained here since June. We have had 90°F temperatures here for most of three months. I still have green grass.