Hawaiian Electric Corporation (HECO) is preparing for severe weather expected to hit the islands later in the week. The company has urged customers to review their emergency plans and maintain supplies. HECO is also coordinating with federal, state, and local agencies regarding response efforts. It is instructing customers to take safety measures such as checking emergency equipment, including flashlights, emergency generators, battery-operated radios, and lanterns. If someone is dependent on electrically powered medical equipment, check backup facilities and plan evacuation plans.