Blood donations have hit a five-year low in Canada, straining the national blood supply at a time when demand typically reaches its highest point.

Front-line paramedics and the Canada Safety Council say summer usually brings an increase in traffic accidents and serious injuries.

“In the summertime, we have an increase in traumatic injuries, whether it be from motorcycles, cyclists, and also just summer parties,” EMS dispatcher Mark McQuay told CTV News.

Canadian Blood Services says it requires 30,000 donor appointments monthly? to meet the demand, and especially needs types O and A blood.

But in recent months, 20 per cent of donors have missed their appointments.

“We are at a five-year low, which obviously we are trying to address,” said spokesperson Pamela Mullins.

Stacey Lacroix is one Canadian who says she likely would have died without blood donations. Five years ago, doctors had diagnosed her with a rare bone marrow disease.

“Had it not been for blood transfusions, I probably wouldn’t be here today,” she said.

Canadians looking to donate can visit blood.ca or call 1-888-236-6283 to set up an appointment.

With a report by CTV’s Katie Simpson in Ottawa