Last summer my front lawn- St. Augustine - had a tough time in the heat, starting with around the front edge. Got weedy (sprayed twice) and finally no lawn. This spring it doesn't look like it is coming back. It looks dead! What advice, put on new lawn or what?
St. Augustine Grass
If you're determined to have a St Augustine lawn, you'll need to consult a turf grass professional or the local Extension Service https://www.gardeningknowhow.com/extension-search/
However, alternatives to monoculture grass lawns are becoming more popular all the time: Here are a few articles to start you thinking: https://www.gardeningknowhow.com/lawn-care/lawn-substitutes/lagen/plant-alternatives-to-traditional-lawn-grass.htm