Wildfires in the Los Angeles area are common, and a particularly intense set of fires are burning right now due to weather conditions specific for the area. Just like mountains can focus rainfall to cause floods, they can also dry air out, which creates drier vegetation and sets the stage for easier burning and spreading. This video talks about how a specific weather setup and a huge mountain range east of Los Angeles combine to occasionally create an environment in which fires can grow and spread explosively. Video also talks about how this process is like the opposite of the Hurricane Helene flood, and whether or not climate change might make these events worse.