A wildfire in eastern Arizona continues to burn, expanding to over 20,000 acres, with more red flag warnings in effect on Monday.

The cause of the blaze that began May 13 was under investigation but had burned grass, shrubs and timber at a rapid pace.

A wildfire that broke out in a rural area of eastern Arizona has burned over 6,400 acres as of Wednesday and continues to move north, according to officials. The Greer Fire, named after the unincorporated community where the fire originated,