CFOs face rising heat to combat climate change from a range of stakeholders. Activists demand commitments to shrink carbon footprints. Investors want both green operations and robust profits. Regulators — including the Securities and Exchange Commission (SEC) — are gearing up to require detailed disclosures on climate risks. When handling such pressure, financial executives draw from an ill-fitting set of tools. They lack a single, detailed framework for measuring climate risk that is recognized across industries, markets and jurisdictions worldwide. Instead, CFOs must choose from among several systems that use different calculation methods and data definitions. The result — they often get just a loose grip on climate risk, according to accountants and experts in sustainability measurement.