OAKLAND (KRON) — A two-alarm wildfire is burning along Grizzly Peak in the Oakland and Berkeley hills Wednesday afternoon.

The fire was first reported around 1 p.m. and is burning along Grizzly Peak Boulevard at Fish Ranch Road.

As of 5:15 p.m., the 20-acre fire is 20 percent contained, no structures were threatened, no evacuations have been ordered and no injuries reported.

The fire is approximately a mile from the Berkeley border and heading East.

Authorities are asking residents to stay off Grizzly Peak Boulevard. Traffic is stopped in both directions.

Anyone who lives in the hills and is preparing to go home should expect delays.

Crews are expected to be on scene throughout the night and into Thursday.

UC Berkeley police issued a warning to students of a possible campus-wide power outage. PG&E has since inspected the fire impacted power lines and issued the all clear. No campus power outage was required.

The only structure lost so far is some sort of picnic table in Tilden Park, according to East Bay Regional Parks.The Tilden Park Steam Train has been closed.

There was a group of about 100 kids in Tilden Park when the fire sparked. They have been moved and are awaiting their parents to pick them up.

Firefighters from Oakland, Berkeley, East Bay Regional Parks and Cal Fire are all battling the fire.

A number of roads east of the UC Berkeley campus are closed. Grizzly Peak Boulevard is closed in both directions between Centennial Drive and South Park Drive.

Orinda Police has issued a shelter in place for residents due to the smoke.

Fire officials say the fire is spreading at a moderate rate.

Here is a statement from PG&E:

CAL FIRE requested that PG&E prepare to de-energize two transmission lines near the area of the fire burning in the Oakland Hills for firefighter safety. We notified UC Berkeley that we may need to de-energize the lines, which interconnect into the campus’s power grid. UC Berkeley has its own internal power system. Due to changing conditions of the fire, CAL FIRE did not ask us to de-energize the two transmission lines. We are standing by to support CAL FIRE and our customers as needed.

An inmate firefighter fell down the hillside and was rushed to the hospital.

His or her condition is not known but he or she was conscious and breathing.Stay with KRON4 News for updates

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