The storm poses significant risks, particularly in wildfire burn scar areas like Big Sur, where debris flows could occur with as little as 0.25 inches of rain in 15 minutes. Coastal regions face a marginal risk of severe thunderstorms, with hazards including damaging winds, lightning, and short-lived tornadoes. Downtown Los Angeles could see 1 to 1.5 inches of rain, potentially making this the wettest October since 2009. In the Sierra Nevada, snowfall could disrupt travel, with up to 10 inches expected in higher elevations, prompting temporary road closures such as Tioga Pass.