Traffic is a mess in the area. Firefighters are in the process of mopping up the quick-burning fire.
The first call came at 1:55 p.m. that a multi-unit three-story apartment building caught on fire.
PHOTOS: Crews battle 3-alarm blaze in San Francisco Inner Richmond District
Fire crews got the residents out quickly, many who didn't even know the building was ablaze.
Firefighters were able to save the building on one side but the flames spread to the two-flat building on the other side, burning the edges of that building.
They quickly snuffed out the fire, which was a difficult blaze because of the abundance of electrical wires overhead.
"They had tough laddering conditions, as you can see. We face these difficulties a lot when we come to these buildings where we have the wires. That's why we keep the wooden ladders. The wooden ladders are really important to us, so we don't get shocked," SFFD Deputy Chief Mark Gonzalez said.
There were no injuries. The cause and the origin of the fire have yet to be determined.
The arson team is currently investigating.
If you see news where you live, tag your photos and videos on Twitter, Instagram, or Facebook with #abc7now.
Huge explosion and fire at O'Reilys on Geary. Hope no one was hurt!! 😧 pic.twitter.com/APnmGBNUT2— Erica Andracchio (@EAndracchio) October 16, 2015