By Holly Quan

SAN FRANCISCO (CBS SF) -San Francisco firefighters are still investigating what sparked Sunday night’s dramatic fire on Yerba Buena Island.

The fire broke out around 7:50 p.m. Sunday near the bridge’s western span, on the southwest side of the island. The flames only consumed about 3 acres of thick brush and tall eucalyptus trees but created a spectacular scene of flames shooting into the air and smoke billowing overhead, promoting motorists to slow and gawk.

Two eastbound lanes on the lower deck of the Bay Bridge were shut down as crews battled the blaze. Flames were visible to eastbound motorists, and those traveling west could see an orange glow around the island and a plume of smoke.

The fire began just as hordes of San Francisco 49ers fans were headed back to the East Bay after watching Sunday’s game at Candlestick Park against the Houston Texans.

Traffic was at a standstill for miles on northbound U.S. Highway 101 as cars—many decorated with 49ers flags—inched toward the bridge.

Lanes on the bridge gradually reopened as crews gained the upper hand on the stubborn blaze, Talmadge said.

The fire appears to have started in the bottom of a ravine in a hard-to-reach area, she said.

“The chances are investigators will not even be able to access that area to make an absolute determination” of the cause, Talmadge said.

“It was difficult to access it to suppress it as well,” she added, noting that crews also used a fireboat to fight the blaze from the water.

Talmadge said she has heard speculation that fireworks may have sparked the blaze, but that investigators have not found evidence of that.

The fire was controlled at 12:07 a.m.

(Copyright 2013 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)


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