The recent lack of rain has stressed out the lawns. They are turning a bit brown. You may water with your sprinklers, but thaqt doesn’t green them up. You see, rain carries nitrogen and other nutrients down to the grass, which greens up a lawn very quickly. Your sprinkler, draws water from a well, or the city, which has no need to add those nutrients to it. So, you need to feed it to get it greened up. Use a slow release lawn food, apply it. Water it in if you like, then watch it green up….