A rare Particularly Dangerous Situation warning has been issued for Southern California as a powerful and potentially damaging Santa Ana wind event​ is expected.

Santa Ana winds return to Southern California from Monday to Tuesday, once again raising fire danger concerns.

The National Weather Service has issued another rare Particularly Dangerous Situation warning in anticipation of Monday's Santa Ana wind event.

The winds fueling Southern California wildfires form when a high-pressure system develops over the Great Basin in Utah and Nevada

The ferocious Santa Ana winds that helped fuel the deadly wildfires around Los Angeles are forecast to ease later Wednesday, but they may return.

The winds will come and go, with the strongest gusts expected early next week, especially next Monday night and into Tuesday, forecasters said.

In recent days, however, the region’s powerful Santa Ana winds—which have been fanning the flames—have begun to slow down. This lull has offered firefighters a reprieve and a key opportunity to make progress against the blazes, but forecasts suggest the Santa Ana will return next week. What are these gusts, and how have they become so strong?

Jon Keeley, a research ecologist in California with the U.S. Geological Survey and adjunct professor at UCLA, explains what causes extreme winds like this in Southern California, and why they create such a dangerous fire risk.

President Donald Trump will visit southern California this week amid looming winds and threats of new flames with tens of thousands of acres torched and buildings destroyed, according to reports.

Another round of fire-fueling Santa Ana winds is lashing Southern California after a brief weekend reprieve helped crews make more progress battling the deadly infernos in Los Angeles County.

Another moderate to strong Santa Ana wind event is expected to develop across Southern California during the first half of the workweek, heightening wildfire dangers in a region still coping with the last significant firestorm from nearly two weeks ago.