The dry season has hit the Prince George's County Red Cross in a different way than most of the area.

Many regular blood donors are away on vacations and holiday accidents are on the rise, making collection of necessary amounts of blood difficult. The Red Cross is calling for volunteers to help the Washington Regional Blood Program of the American Red Cross with its daily task of supplying more than 800 blood units to 68 area hospitals.

The Prince George's County Red Cross sponsors more thna 20 bloodmobiles each month in the county. The process of donating blood is simple and saft, they report, and takes about 45 to 50 minutes. Specially trained registered nurses supervise the technical procedures.

Anyone between 18 and 66 years old with normal blood pressure, who weighs at least 110 pounds, can donate blood. For more information, call 559-8500, ext. 52.

The following bloodmobiles will operate in Prince George's County this summer.

JULY-22: Andrews Air Force Base, Recreation Center, 9 a.m. to 3 p.m.

23:VFW Post 9619, 6527 Suitland Rd., Morningside, 9 a.m. to 2 p.m.

29: Government Printing Office, Laurel, 9.30 a.m. to 3:30 p.m.

AUGUST-4: St. Barnabas Church, 5203 St. Barnabas Rd., Oxon Hill, 9:30 a.m. to 3:30 p.m.

5: American Distributors, 8415 Ardmore Rd., Landover, 9 a.m. to 3 p.m.

8: Bowie Library, 15210 Annapolis Rd., Belair, 2 to 8 p.m.

10: Goddard Space Flight Center Building 8, Greenbelt, 9 a.m. to 3 p.m.

13: Red Cross Chapter Building, 6206 Belcrest Rd., Hyatsville, 9 a.m. to 1 p. m.

16: Mini-van at the Washington Records Center, Suitland, 9 a.m. to 3 p.m.

22: Maryland-National Capital Park and Planning Commission, 6600 Kenilworth Ave., Riverdale, 9:30 a.m. to 3:30 p.m.

26: Andrews Air Force Base, Recreation Center, 9 a.m. to 3 p.m.

31: Red Cross Chapter Building, 6206 Belcrest Rd, Hyattsville, 9:30 a.m. to 3:30 p.m.