This state Heatwave Sub Plan describes the strategic emergency management arrangements for heatwaves affecting New South Wales, including Lord Howe Island. This Plan is written and issued under the authority of the NSW State Emergency and Rescue Management Act 1989 (‘SERM Act’) and the NSW State Emergency Management Plan (EMPLAN). In addition to these instruments, the following Acts and Regulations apply to managing Heat Waves in New South Wales. This plan has been prepared on behalf of the State Emergency Operations Controller and was endorsed by the State Emergency Management Committee, in accordance with the State Emergency and Rescue Management Act 1989 (as amended), Section 15 (e), in April 2023. This plan acknowledges and aligns with the National Heatwave Warning Framework, which includes guidance on the use of the Australian Warning System for heatwaves Heatwave Service for Australia (bom.gov.au)