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Hawaii residents rushed to stores to stock up on bottled water, ramen, toilet paper and other supplies as they faced the threat of heavy rain, flash flooding and high surf as a strengthening hurricane continued to churn toward the state.

On Tuesday night, the National Weather Service announced that Hurricane Lane had become a Category 5 hurricane, which means that it is likely to cause catastrophic damage with winds 157 mph or above. The hurricane is about 500 miles (804 kilometers) southeast of Honolulu.

Earlier Tuesday, the weather service issued a hurricane warning for Hawaii island and a hurricane watch for Oahu, Maui and other smaller islands, meaning tropical storm-force winds, excessive rain and large swells could arrive starting Wednesday.