Extreme heat is fast becoming one of Asia’s least-recognized, most underfunded, yet increasingly unavoidable climate threats. By 2050, nearly 1.2 billion people will live in areas potentially exposed to lethal heat waves. With 43 percent of Asia’s workforce employed in climate-exposed sectors, the likely economic consequences are mounting. As soon as 2048, heat-related loss of productivity could shrink the region’s GDP by more than 25 percent—threatening food security, economic resilience, and public health. Yet, Asia’s adaptation finance remains fragmented and poorly adopted. Many at the frontlines lack both technical know-how and access to appropriate financing mechanisms. Microloans, parametric insurance, and dedicated fiscal funds offer not only practical solutions for emergent challenges, but also timely opportunities for climate financiers, reinsurers, and regulators to unite in building a more climate-resilient society.