Hawaiians are being urged to be ready for any emergency or evacuation as Hurricane Hector nears the US state.
Authorities warned of large swells and dangerously rough surf as well as hurricane force winds when the storm passed south of Hawaii later this week.
On Monday afternoon in Hawaii, Hector was a category four storm as it moved closer to the Big Island.
Hiro Toiya of Honolulu's Department of Emergency Management said people should monitor each county's weather warnings and watches.
"The first thing is making a plan. Talking things over with your family. What are you going to do and where are you going to go?" Mr Toiya said
"Also be aware of your surroundings. What are the things that might impact you at work or at home?" he said.
"Create a checklist so when a watch or warning is issued you know exactly what you are going to do. The next thing is to put together an emergency supply kit."
Battery-powered radios were handy to have as well as one gallon of water per person per day to last for at least 14 days, Mr Toiya said.