I live in a very dry part of the country, even this year, but my grass never turns brown. I use a manual mower (no fighting with the cable or disturbing the peace with noisy machine), use the highest setting all season, never weed or feed and allow the wild flowers to grow. There aren't many weeds, despite my planting daisies & speedwell. Insects & birds love it & I have a lovely lush green lawn all year round, for less effort.
George - sodium chlorate is very persistent. Allow 6 months on free-draining soil, up to a year on heavy clay, before replanting. You shouldn't need the membrane, except it hides the dead & dying herbiage. Good luck.