Residents in southern California are in the middle of a "Particularly Dangerous Situation" as wind stays in the forecast with still raging wildfires, according to officials.

LOS ANGELES (AP) — Millions of Southern Californians were on edge as a final round of dangerous fire weather was forecast for the region on Wednesday, along with a rare warning of a “Particularly Dangerous Situation” for an area near where two massive blazes have killed at least 25 and destroyed thousands of homes.

As fires in the region remain uncontained, L.A. officials say they’re “ready” for an incoming new round of strong winds.

Here's a guide to understanding "particularly dangerous situation" red flag warnings, containment, and other terms related to the devastating fires that have left much of the LA area in ruins.