Directs NOAA (through its Climate Program Office, coordinated with the National Integrated Heat Health Information System) to carry out an economic study that quantifies the financial costs of extreme heat. The study must assign dollar values to losses including loss of life and property, evaluate a wide range of cost sources (medical, insurance, productivity, infrastructure, agriculture, energy, etc.), solicit feedback from federal and nonfederal partners, recommend a national tracking system, and be published within four years; $3.5 million is authorized to carry out the work.