RDOS President Karla Kozakevich declared a state of emergency on Monday evening after the fire broke out six kilometers north of Osoyoos on Monday afternoon, reaching about 700 hectares.
The state of emergency will remain in effect for seven days and is in addition to the state of emergency declared by the City of Oliver on Monday evening.
The fire grew rapidly and is still out of control.
Evacuation orders and alerts were issued Monday evening by the Osoyoos Indian Band and the Okanagan-Similkameen Regional District.
Search and rescue teams were assisting the RCMP with tactical evacuations for those at immediate risk.
On Monday evening, 12 BC Wildfire Service personnel were fighting the blaze, along with five helicopters and tankers.
Tankers dropped a retarder on the western flank of the fire, the closest to the homes. Firefighters also worked on the western flank and personnel remained on site overnight.
Electricity was cut on the western flank, closest to the houses, so that the teams could continue to fight the fire in complete safety.
Nighttime photos of the area show flames dangerously approaching homes in The Cottages development, separated only by a green strip of vines above the homes.