The primary risks include dangerous rip currents, high surf, and potential coastal flooding. Rip currents pose a significant threat to swimmers, especially those who are inexperienced or unfamiliar with local conditions. Beaches already affected by erosion, such as Laguna Beach and Dana Point, may experience further damage. In Mexico, coastal areas in Guerrero and Michoacán face immediate risks, including 3 to 6 inches of rain with isolated totals up to 8 inches, which could lead to life-threatening flooding and mudslides.