Update, 5 p.m.
Crews contained the vegetation fire at 222 Cimarron Way in Nipomo at 1.7 acres about 2:19 p.m., according to Cal Fire.
No structures were damaged by the fire. The cause of the incident remains under investigation.
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Cal Fire says crews are making progress fighting a vegetation fire in Nipomo on Sunday.
The fire began about 11:37 a.m. at 222 Cimarron Way and has burned 2 acres of grass and oak woodlands, a Cal Fire captain said. A couple of structures are threatened by the fire.
The cause of the fire is under investigation.