After the outbreaks in July Florida, the Carolinas, Arizona, and other states in the southern U.S. imposed some form of mask mandates either locally or at the state level. This combined with the restrictions on gatherings and reversal of opening of restaurants and bars, other places of gatherings, have helped slow the spread and reduce cases. Even though the cases are still high there is a levelling off in late August, says this report in the NYT, with graphs in color showing trends.