Fire Along American River Parkway Burns 173 Acres

SACRAMENTO -- Fire crews are on the scene of a grass fire burning near Cal Expo along the American River Parkway.

It started as a small fire but quickly grew into multiple blazes along the American River Parkway on Thursday afternoon. Huge plumes of smoke could be seen for miles, and more importantly, the fire was a big threat for Cal Expo.

"We have the equivalent of four alarms right now, they requested 10 additional engines, so we're gonna have probably over 150 firefighters by the time we're all done," said Chris Harvey with the Sacramento City Fire Department.

Another problem crews faced -- power lines were popping and there were reports of power outages in both Davis and West Sacramento.

"These are spot fires, wind driven, these are very difficult for our crews to fight additionally we had a lot of fire underneath power lines, which is an additional hazard for our crews as well as it makes it difficult for our helicopter to operate under the power line," Harvey said.

And despite numerous water drops, flames crept closer to Cal Expo, prompting evacuations for part of the grounds, including a much-anticipated RV show with hundreds of customers.

"It was until about two hours ago, and then people started evacuating. Now you see it? It's dead quiet," said RV vendor Bob Wilson.

"It's time for us to go home. All of our customers are gone. There is no use staying around here. What does this do to business? You shut down, but there is always tomorrow," said RV salesman Walt Hood.

According to Tweets from Sac Metro Fire, a Sacramento firefighter has been released from the hospital is doing well.

The American River Parkway bike trail will remain closed overnight.

The cause of the fire is unknown.

Stay with FOX40 for updates on this fire.