One-third of Australia's flying fox bat population wiped out in just 2 days.

Australia has been sweltering in a second severe heatwave this month. Temperatures have reached 21.6 F degrees higher than average as a heat wave spread across the continent.  The unbearable heat will be plaguing Australia for at least several more days warns the Australian Bureau of Meteorology.

Records fell throughout Australia as the country experienced the hottest ten days in a row on record. One town, Noona, had the warmest overnight temperature in Australian history. Agriculture and livestock are suffering from the heat where stone fruit is burning from the inside out and drought widespread. Roads are melting too.

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Broken Hill, White Cliffs, Wilcannia, Ivanhoe, Albury and Narrandera have all broken their all time maximum temp records today. While Deniliquin, Yanco and Condobolin have set new records for the month January. Full #NSW details: https://t.co/AIwC8xjgsO#Heatwavepic.twitter.com/TJ7Y4uBhh6

— Bureau of Meteorology, New South Wales (@BOM_NSW) January 16, 2019

Australia is in the midst of a scorching heat wave this week that has set all-time temperature records in what has been four of its most sweltering days in history.

The Bureau of Meteorology (BOM) in Australia said Saturday, Sunday, Monday and Tuesday ranked among the top 10 hottest days on record for the country as whole.

Australians have been warned to stay indoors as the country's heat wave hits a record highs. "Avoid physical activity, stay well hydrated - it's vital at this time," said Richard Broome, director of environmental health for the New South Wales state government. He also urged people to stay indoors during the heat of the day.  

Humans can stay indoors in the air conditioning, but not wildlife and livestock. They are experiencing a rising death toll from increasing heatwaves due to climate change. Their bodies just can’t cool off.

In one state, officials are pumping oxygen into rivers and lakes as fish kills explode in number.

Mother Board reports on the rising toll to bats from climate change driven heat waves. 

Almost one third of a bat population in eastern Australia was killed over the course of just two days of November of 2018, when a heat wave in eastern Australia devastated the Queensland region and temperatures were as high as 108 degrees Fahrenheit. Climate change makes heat waves like this one disproportionately more likely.

An estimated 23,000 to 30,000 spectacled flying fox bats perished during the heat wave, which lasted from November 26 to 27, according to the BBC. Some media reports alleged that once the temperatures exceeded 104 degrees Fahrenheit, bats literally started falling out of trees. David White, a wildlife rescuer from Australia, told the BBC that the event was "totally depressing.”

Justin Welbergen from Australia’s Hawkesbury Institute for the Environment told Australian outlet ABC.net that the event was likely the second-largest mass die-off for the species, which have been listed as “vulnerable” in the country since 1999. In 2014, as many as 100,000 spectacled flying fox bats died, also during a heat wave.

The late-November Australian heat wave also caused more than 80 intense brush fires, and coincided with a series of dust storms that swept across the Queensland region. It’s worth noting that desertification—the process of places becoming more dusty, dry, and desert-like over time—is exacerbated by climate change.

Climate change makes monster heat waves like this one disproportionately more likely. When the air gets hotter, it’s able to hold more water, and humid air makes heat waves more likely. Australia specifically, which is already prone to heat waves, is vulnerable to "more frequent, hotter, and longer" heat waves.

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The BBC reports that these heat waves are certainly causing die-offs for other wildlife. The flying fox deaths are easy to document as they reside in urban areas and their deaths noticed.

Koala trying to cool off during the recent heatwave.

Flying foxes are no more sensitive to extreme heat than some other species, experts say.

But because they often gather in urban areas in large numbers, their deaths can be more conspicuous, and easily documented.

"It raises concerns as to the fate of other creatures who have more secretive, secluded lifestyles," Dr Welbergen says.

He sees the bats as the "the canary in the coal mine for climate change".

"It is clear from the present data that these [heat] events are having a very serious impact on the species," Dr Welbergen says. "And it's clear from climate change projections that this is set to escalate in the future."

Experts have long been concerned about the survival of spectacled flying foxes.

Its population has more than halved in the past decade, says Dr David Westcott, who chairs the government's National Flying Fox Monitoring Programme.

In the past, mass deaths in the population were often associated with cyclones. But in recent years heatwaves have become a bigger risk, Dr Westcott says.

"We're very concerned. It's been a massive population decline for a species that isn't under a great deal of pressure outside of these weather events," he tells the BBC.

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