(Fire engine on watch in 8400 block of 20th SW; line goes to scene along the alley, out of view)
6:39 AM: Firefighters have been keeping “fire watch” this morning after putting out a fire in in the 8400 block of 20th SW (map). That means they’re guarding the scene to make sure the fire doesn’t re-ignite. No injuries, the crew on scene told us; we’ll add information about the damage and cause when that’s available later this morning.

7:44 AM: Went back for that photo after talking with the battalion chief at another fire-response scene. We’ve learned no one was home at the time of this fire, which did most of its damage in the rear of the house, facing an alley.

9:58 AM: SFD has published an update on the fire, saying a space heater was to blame; damage totals $125,000. SFD’s update includes information about home-heating safety.