Hawaii is bracing for additional heavy rain and flooding as a third storm system is set to impact the islands, following recent devastating weather events. Residents are urged to prepare for potential flash flooding, strong winds, and significant rain accumulation. Emergency shelters are being opened on Oahu and utilities are advising the public to take necessary precautions. The National Weather Service has issued flood watches for all counties as the state anticipates days of heavy rainfall, raising concerns for those still recovering from previous floods. Officials stress the importance of preparedness as conditions are expected to deteriorate, with the possibility of severe weather persisting into the weekend.