Oahu is generally a safe tourist destination, but it's still wise to follow the same common-sense safety precautions you would normally follow in your own hometown. Rental cars are magnets for break-ins, so don't leave any valuables in the car, not even in a locked trunk. Avoid poorly lighted areas, beach parks, and isolated areas after dark as a precaution. When hiking, stay on marked trails, no matter how alluring the temptation might be to stray. Weather conditions can cause landscapes to become muddy, slippery, and tenuous, so staying on marked trails will lessen the possibility of a fall or getting lost.
Women traveling alone are generally safe on the Islands, but always follow the safety precautions you would use in any major destination. When booking hotels, request rooms closer to the elevator, and always keep your hotel-room door and balcony doors locked. Stay away from isolated areas after dark; camping and hiking solo are not advised. If you stay out late visiting nightclubs and bars, use caution when exiting nightspots and returning to your lodging.
Distribute your cash, credit cards, IDs, and other valuables between a deep front pocket, an inside jacket or vest pocket, and a hidden money pouch. Don't reach for the money pouch once you're in public.
Transportation Security Administration (www.tsa.gov.)