Melbourne is experiencing an extreme heatwave, with temperatures in the city climbing to 42 °C as severe conditions grip Victoria and much of Australia. Heatwave warnings are in place nationwide, with forecast highs of 44 °C in Mildura, 41 °C in Adelaide, 36 °C in Canberra, and 31 °C in both Sydney and Brisbane, prompting authorities to urge precautions against heat-related illness.