The Brief Heavy rainfall triggered severe McCaysville flooding Saturday night, damaging the town's water system and putting a boil water advisory into effect. Local businesses remain closed due to water contamination, but community members are coming together to assist in recovery efforts. Downtown McCaysville is slowly recovering after a severe weekend storm dumped several inches of rain in eight hours, creating chest-deep floodwaters that damaged the town's water infrastructure and forced a boil water advisory. As a result of recent flooding in the area, we are providing this update about the McCaysville Post Office. 500-year flood explainedBy the numbers:Heavy downpours dumped five to six inches of rain on McCaysville over six hours, fitting the criteria for a 1-in-500-year flood.