The article discusses the fully electrified energy system on Oʻahu, focusing on the island's transition to electric technologies and renewable energy resources. Seawater district cooling systems offer a more energy-efficient approach to meeting the cooling demand of densely populated areas in Hawaii, such as Waikīkī and downtown Honolulu. These systems could potentially serve over 50,000 tons of cooling demand in these areas, resulting in energy savings of up to 92.5%. Seawater cooling systems in Oʻahu help reduce electricity consumption during peak hours, lowering the need for generation and storage capacity, and complement other renewable energy strategies in the island's electrified energy system.