A brush fire sparked near Interstate 17 in Cordes Lakes Sunday afternoon.
Officials say the Sunset Fire, sparked by a vehicle fire, has spread to the wildland.
The Arizona Bureau of Land Management says resources including aircraft are aiding ground crews.
BLM Arizona says as of late Monday morning, the fire is 40% contained and estimated to be approximately 4,000 acres as the fire remains on the east side of I-17.
Officials also say Sunset Point rest area was evacuated as a precaution, due to the brush fire.
A portion of the I-17 was blocked due to the fire, but Arizona Department of Transportation officials said Monday morning that it had since reopened.