Mandatory evacuations have been ordered in the Bell Canyon area of Los Angeles following a pop-up brush fire. NBC News' Jacob Soboroff reports on residents' responses and how dry vegetation combined with hurricane-force winds have created the dangerous conditions they now face.

A pair of massive wildfires menacing Los Angeles from the east and west were still burning unchecked early on Thursday, two days after they ignited, but firefighting crews made progress overnight in controlling a smaller blaze burning in the hills overlooking Hollywood Boulevard.