Experts and BHG readers answer.
Burned St. Augustine
You will just have to wait and see if it comes back. It may. Keep it watered and wait a month or two to see if any signs of life appear. If not, then of course you will just have to resod the affected areas. It takes a while for the chemicals to degrade in the soil, a few weeks to a month or more. So don't try to replant immediately.