The remnants of Hurricane Rachel are expected to cause heavy rain, isolated thunderstorms, and dangerous surf conditions along the Southern California coast. Coastal flooding is highly likely, with significant beach erosion and an increased risk of ocean drowning due to rip currents and large waves. Small boats nearshore are at risk of capsizing, and swimmers and surfers are advised to exercise extreme caution. The storm may also bring much-needed rainfall to the region, which has been experiencing a heatwave with record-breaking temperatures.