CAIRO (AP) — Canadian authorities are urging all remaining residents in the northeastern part of the province of British Columbia to leave immediately, despite improving weather conditions, after thousands have already been evacuated due to a fast-growing wildfire.

The blaze, which started Friday, almost doubled in size the following day, reaching about 17 square kilometers (4,200 acres). BC Wildfire Service maps showed the fire burning just a few kilometers (miles) west of Fort Nelson’s city limits.

Online footage shared by locals showed thick plumes of smoke rising high into the sky with houses in the foreground. In some photos, haze seemed to cover wide areas.

The Northern Rockies Regional Municipality and Fort Nelson First Nation issued a joint statement warning people staying behind that “emergency medical services are not available, nor are groceries or other amenities.”