Hurricane Nolo is expected to bring heavy rainfall, with totals ranging from 10 to 15 inches (254 to 381 mm) and isolated amounts up to 20 inches (508 mm) in Hawaii, leading to potential flooding and mudslides, particularly in steep terrain. Large and damaging waves are also anticipated along the Big Island's coastline. Hurricane Polo poses a significant threat to Mexico's Baja California Peninsula, with the potential for life-threatening flooding, mudslides, and storm surge. Tropical storm conditions could reach the Mexican coast as early as the evening of September 27, making last-minute preparations challenging. Both hurricanes are expected to cause hazardous surf and rip currents along affected coastlines.