Trevor Clare of Limestone Station near Broken Hill, where yesterday's high was over 44C. Picture: Braden Fastier Source: News Limited
WEATHER analysis to be released today is expected to show Australia is sweltering through its hottest days in history.
Bureau of Meteorology forecast modelling estimates show the mercury was expected to hit a new national record yesterday and today.
The previous national high of 40.17C set was on December 21, 1972.
Yesterday's national temperature will be released at 2pm.
We're not even at the half-way mark and it's already looking like the cruelest of summers, with catastrophic weather conditions on the cards over the next 24 hours
Monday may only be a record for 24 hours, as today is expected to be even hotter as the spread of heat widens.
Sydney heatwave just beginning
The national temperature is calculated from about 700 weather stations across the country, but is processed as a mathematical interpolation instead of an average.
Hanna Basso with daughter Brigitta Whilbey at Brighton beach in Adelaide on another hot day. Picture: Calum Robertson
Bureau figures for Sunday, released yesterday, show the national temperature was 39.71C, and marked the first time it has stayed above 39C for five days in a row.
But bureau climate monitoring manager Karl Braganza said he expected that record to stretch to seven days when yesterday and today's figures were calculated.
"The forecast for today and tomorrow is expected to exceed that record of 40.17 degrees," Mr Barganza said.
"It will be touch and go, these records are hard to break. But we're expecting to at least give it a good push."
The hottest place today is forecast to be Oodnadatta in South Australia, at 46C.
The coolest places should be in national parks on the southern tip of Tasmania, at 16C.
Ouyen farmer Brent Morrish walking across scorched Victorian earth with dogs Beau and Lucky.
The bureau believes waves of heat will repeat every few days until a monsoon breaks the pattern.
Weather services assistant director Alasdair Hainsworth said a low near Timor could develop into a cyclone in the next day or two
But he added that without a circuit breaker, the waves of extreme heat would continue.
"Unfortunately, with this super-hot air, we could see this pattern continue repeating itself for a while until we see the hot air flushed out," he said.
Sisters Emma and Zara, from South Yarra in Melbourne, cool off at the Prahran pool. Picture: Stuart Milligan
The bushfire danger extends far beyond Sydney's city limits, with parts of the state are already copping it
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