Heatwaves result in significant excess mortality, particularly amongst the elderly, and pose formidable health care challenges. This presentation examines selected heatwave response plans at national, state/provincial, and municipal levels from Australia, Canada, the United Kingdom, and the United States of America, with a particular focus on specific responses aimed at residents of aged care facilities. Heatwave response plans were sourced via internet searches and direct contact with national, state/provincial, and municipal level health departments in the countries listed. The countries selected share English as at least one official language, and are developed, high income nations that are experiencing demographic transition that features growing ageing populations. A total of 23 heatwave response plans dated from December 2004-January 2013 were obtained. Plans reviewed varied in terms of issues covered and importance attached to them. Key components found across the plans were analysis of temperature thresholds, heat stress prevention measures, and communication strategies. Analysis of temperature thresholds of 16 response plans and latitude of related locations found some correlation. Only three plans analysed included specific guidance for aged care facilities. Inconsistency in plans and projected increases in severity and frequency of heatwaves in coming decades underline the need for governments to implement effective guidelines that include specific provisions for aged care facilities.