A health alert has been issued for parts of Victoria where the temperature is set to climb on Thursday.
Melbourne is due to reach 35C while some centres in the state's northwest could surpass 40C according to the Bureau of Meteorology.
The state government's warning covers districts including the Mallee and Wimmera.
"The chief health officer has issued a heat health alert to notify you of forecast extreme heat conditions at or above heat health temperature thresholds," the statement read.
The hazard continues on Friday when temperatures are expected to increase further, with Melbourne stretching to 38C and inland regional centres including Mildura, due to record 40C.
Australian Associated Press