The American Red Cross says there is a blood supply shortage and is asking for donors to give blood as soon as possible.

Donors of all blood types, especially those with type B negative or O negative blood as well as platelet donors, are needed to make an appointment to give now to ensure blood remains available for patients this summer.

To encourage blood donations, the Red Cross is offering the following to those who come to give in the coming weeks:

• All who come to give blood, platelets or plasma through June 30 will receive a $10 gift card by email to a merchant of their choice. Those who come to give in June will also be automatically entered for a chance to win a backyard theater package. Details for both offers can be found at RedCrossBlood.org/June.

• All who come to give blood, platelets or plasma July 1-11 will receive an exclusive Red Cross dry bag, while supplies last. Details are available at RedCrossBlood.org/gifts.

By scheduling and keeping appointments right now, donors can help ensure patients relying on blood donations also get to enjoy their summer. To schedule an appointment, download the Red Cross Blood Donor App, visit RedCrossBlood.org or call 1-800-733-2767.