Australian Government Bureau of Meteorology Northern Territory TOP PRIORITY FOR IMMEDIATE BROADCAST Heatwave Warning Issued at 02:09 PM CST on Thursday 11 December 2025 Valid for Thursday 11 December 2025 to Sunday 14 December 2025 Warning for the following areas: Arnhem, Simpson and Lasseter 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 forties and overnight minimum temperatures in the mid twenties in the south. Over the eastern Top End, maximum temperatures in the high thirties to low forties and overnight minimum temperatures in the mid twenties in the south. Severe heatwave conditions across southern parts of NT will ease over the weekend as a milder change moves through. Severe heatwave conditions are developing over northeastern NT and are expected to peak over the weekend and into early next week. Locations likely to be impacted include Bulman, Jervois, Kaltukatjara and Yulara. The next heatwave warning will be issued by 3:00pm CST on Friday 12 December 2025