It may require some trial and error adjusting the dial on the flapper and observing the results over a few days.
Strategy 1. Adjust the dial so the maximum amount of water is left behind in the tank when the flapper closes but the toilet still flushes reliably.
Strategy 2. Put some food coloring in the bowl. Adjust the dial so the coloring is consistently eliminated during the flush.
States can help recovery from hurricanes and tornadoes by not requiring due digence or prompt and timely correction of substandard conditions, and by providing continued liability insurance where companies drop homeowners.