A "red flag" warning means dangerous wildfire conditions are happening or about to happen. The National Weather Service says ...

The National Weather Service has introduced a new warning called the "particularly dangerous situation" (PDS) red flag ...

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MONTANA - A new fire warning called a "Particularly Dangerous Situation" (PDS) Red Flag Warning has been introduced by the ...

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The National Weather Service office issued a rare 'Particularly Dangerous Situation' red flag warning for the coming days in Los Angeles and Ventura counties.

Particularly Dangerous Situation, or "PDS" for short, is the most extreme advance notice that can be issued for expected weather hazards by the National Weather Service.

More families could be in harm’s way, as officials are warning a “particularly dangerous situation” could play out in the Davis Fire in Nevada, while multiple wildfires continue to rage ...

The "particularly dangerous situation" wording is used in "rare situations when long-lived, strong and violent tornadoes are possible," the weather service said.

A “particularly dangerous situation” is an enhancement of a red flag warning, which already warns of critical fire weather and the rapid spread of fire should an ignition occur.

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.