Highland Day, originally scheduled for Oct. 3, has been postponed until Oct. 31 because of weather concerns.
Although Hurricane Joaquin is forecast to move farther from the East Coast, the Mid-Atlantic region is still expected to receive heavy rainfall and potential flooding this weekend.
In Howard County, which is under a National Weather Service flash flood watch until Saturday evening, the Office of Emergency Management is preparing for the storm, officials said.
According to the OEM, flash flooding could occur in Howard Friday afternoon and into the night. Forecasts predict two to three inches of rain over that period.
Organizers of Highland Day said heavy rains over the weekend would make using grass parking lots for the event, an annual celebration of the community located between Clarksville and Fulton, impossible.
An email from the Greater Highland Crossroads Association said the decision was made "in the interests of safety and the comfort of our exhibitors and guests."
The festival will instead take place on Halloween, from 11 a.m. to 4 p.m.