As of this afternoon, the fires had shifted and were no longer considered a significant threat to Irvine homes.
Here’s a map of the areas affected so far. The fire started — or I should say “was started,” since it’s now believed to be an arson fire — in the area bounded by the top of the map, the 261 to the west, the 241 to the east, and Portola Parkway to the south.
Firefighters were able to stop the fire from crossing Portola, but it continued to burn east and is now bearing down on Foothill Ranch, the residential area in the lower right corner of the map . . .