Same here. We've had no real rain for weeks and our lawn is yellow, too. But it's not dying. It will rebound when rain comes again or you water. Personally, I don't water, too expensive, and the grass is not dying, it's just dormant. Um, unless you mistakenly put RoundUp on it. Then, yeah, you should water, just in case, though I would think it would have really died by now if you had put RoundUp on it.