Australian Government Bureau of Meteorology Australian Capital Territory TOP PRIORITY FOR IMMEDIATE BROADCAST Heatwave Warning Issued at 07:18 AM EDT on Thursday 18 December 2025 Valid for Wednesday 17 December 2025 to Saturday 20 December 2025 Warnings for Wednesday 17 December Warning for the following areas: Australian Capital Territory Safety Advice: Severe heatwaves can be dangerous for many people, especially older people, babies, children, pregnant and breastfeeding women, people with medical conditions and people who are unwell. Seek a place to keep cool, such as your home, a library, community centre or shopping centre. Close your windows and draw blinds, curtains or awnings early in the day to keep the heat out of your home. If available, use fans or air-conditioners to keep cool. Maximum temperatures in the low to mid thirties and overnight minimum temperatures in the mid to high teens across the ACT. The heat will peak during the end of the week then begin to ease over the weekend. Locations likely to be impacted include Canberra, Belconnen, Gungahlin, Tuggeranong and Woden Valley. The next heatwave warning will be issued by 3:00pm EDT on Friday 19 December 2025