Heavy Rain from Fay Remnants; Severe Thunderstorms Central U.S.; Dangerous Heat in the South - Post-Tropical Fay will bring heavy rainfall which may result in flooding in areas with poor drainage across portions of upstate New York today. Severe thunderstorms with damaging winds and hail are possible today from parts of Kansas and Oklahoma into the lower and mid Mississippi Valley. Heat Advisories and Excessive Heat Warnings are in effect through this weekend across the Southern U.S.