The Town of Vienna has canceled the and Town Green scheduled for Friday because of severe weather warnings.
The National Weather Service issued a flash flood warning for Vienna and Fairfax County from noon through the evening.
In Vienna, showers and thunderstorms could start before noon, with another chance of showers and thunderstorms between noon and 2 p.m., and again after 2 p.m.
Several more showers are expected to happen in intervals throughout the evening and overnight hours, NWS says.
The town says it will reschedule both events for a date later this summer.