The B.C. Wildfire Service said 142 new fires broke out across the province on Friday.
Information officer Kevin Skrepnek called it an "extraordinary" day. That's almost four times the size of Stanley Park.
The last time the province declared a state of emergency was in 2003.
A wildfire raging about 200 kilometres northwest of Kamloops, on the west shore of Lac La Hache, has forced about 3,600 people out of the area.
A wildfire in British Columbia's Cariboo region has scorched more than 12 square kilometres of bush near 100 Mile House.
No properties were at risk of burning by Friday afternoon, but officials issued the order to leave because of concerns about changing wind patterns and heavy smoke cutting off access roads and evacuation routes, Richmond said.
Interior Health said the 100 Mile District General Hospital, two residential care sites and an assisted living facility were also evacuated.
On Friday, the winds continued to vary in both strength and direction, with the weekend's weather forecast not showing much potential for rain.
Human-caused fires are completely preventable and unnecessarily tie up crucial firefighting resources that could be used to deal with naturally occurring wildfires.
Emergency BC is also providing timely updates on evacuation alerts and orders, as is the Cariboo Regional District Emergency Operations Centre. Evacuees in and south of 105 Mile report to the reception centre in 100 Mile House at the Curling Club.
On Saturday morning, an evacuation order was issued for the South Lakeside area at Williams Lake due to wildfire.
Thirty-three homes in the direct path of the fire were ordered to evacuate shortly after the fire started.