While summer may mean vacations and family fun at the Jersey Shore, all this activity could also result in more medical emergencies, especially with increased traffic on the roads and people enjoying swimming, boating, sportsand other outdoor seasonal pursuits. At this time, the American Red Cross Jersey Shore chapter makes an appeal for blood donations, and a blood donor drive is scheduledat the Barnegat branch of the Ocean County Libraryon Tuesday, Aug. 27,from 2 to 7 p.m.