Urgent action is needed to protect coral reefs in the face of a changing climate. In Hawaiʻi, outflow from an electric plant warms a coral reef by 5 °C above normal. Surprisingly, corals are thriving here. If these corals have adapted to a warmer environment, they could enhance the long-term effectiveness of reef restoration efforts. In this project, we will conduct transplant experiments to test whether these corals retain their heat tolerance even after transplantation to cooler reefs.