A car carrying two people drove into a washout near Summerland early Monday morning while it was still dark out, officials said.
It happened on the Princeton-Summerland Road before the washout was reported, according to the transportation ministry.
Both women inside the car were taken to hospital.
The washout is about one kilometre west of Mountain View Road. The area is now blocked off in both directions.
The ministry is starting repairs, but there is no estimate on when the road will reopen.
Drivers are asked to use an alternate route, such as Highway 97 and Highway 3; or Highway 97, Highway 97c and Highway 5.Follow @Jules_Knox