Whistler was short one ambulance on Friday while Pemberton had no ambulances in service that same night.
The shortage happened after more than 50 paramedics in the Lower Mainland, Fraser Valley and the Sea to Sky corridor booked off immediately prior to their scheduled shifts.
"The impact on the Whistler Health Centre was relatively minor," said Vancouver Coastal Health spokesperson Trudi Beutel.
"On Saturday it did result in the delay of a non-emergency transfer out of Whistler to Vancouver and that delay was about two hours but that was the only incident."
The B.C. Ambulance Service sent out a public advisory to let members of the public know about the reduced service.
"Life threatening emergency calls will continue to be responded to on a priority basis, however, low acuity calls and inter-facility patient transfers will likely be delayed," stated the press release.
There were four ambulances out of service in total in the Sea to Sky region Friday night. That's a 50 per cent reduction in ambulance coverage.
The Fraser Valley was the hardest hit by the service cuts with 13 ambulances out of service for the 87 per cent reduction in ambulance coverage.
B.C.'s paramedics have been on strike since April. At that time they began working under essential services rules. Recently the provincial government legislated them back to work.