Santa Ana winds occur when air flows west from a region of high pressure over the dry Great Basin to lower pressure off the California coast, According to Accuweather. As that cool interior air flows over and through mountain passes, it accelerates, sinks and compresses.

The recent wildfires in Los Angeles were intensified by strong Santa Ana winds, which are a unique weather pattern in Southern California. These winds are caused by the topography of Southern California and the circulation of a strong high-pressure system over the Rocky Mountains.