This article discusses the importance and implications of climate risk disclosure in accounting and business. It highlights that climate risk is no longer a sustainability issue and must meet the definition of materiality to require disclosure. The article explores the guidance provided by the Australian Accounting Standards Board and the Auditing and Assurance Standards Board, emphasizing the need for companies to disclose assumptions and explain the true extent of any impact. It also discusses the role of investors in decision-making and the measurement of emerging risks.