Millions of Southern Californians are on edge as a final round of dangerous fire weather is 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

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.

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.