this post was submitted on 27 Jan 2026
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Australia’s southern states are scorching in extreme heat that could break temperature records in Victoria and South Australia on Tuesday.

At Ouyen and Mildura in north-west Victoria, temperatures of 49C were forecast for Tuesday afternoon. If reached, they would break the state’s all-time temperature record of 48.8C, set in Hopetoun on Black Saturday in 2009. By 1pm, temperatures of 46.2C in Ouyen and 44.8C in Mildura had been recorded.

At Ouyen and Mildura in north-west Victoria, temperatures of 49C were forecast for Tuesday afternoon. If reached, they would break the state’s all-time temperature record of 48.8C, set in Hopetoun on Black Saturday in 2009. By 1pm, temperatures of 46.2C in Ouyen and 44.8C in Mildura had been recorded.

In Adelaide, the mercury hit 40C before 9.30am on Tuesday, after overnight lows of 35C, BoM observations showed.

Extreme heat is the most common cause of weather-related hospitalisations in Australia, and kills more people than all other natural hazards combined. What does exposure to extreme heat – such as a temperature of 49C – do to the body?

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[–] nutsack@lemmy.dbzer0.com 34 points 1 day ago (11 children)

it kind of sucks living in a part of the world that requires you to sit in air conditioned bubbles all day. it's a fucking depressing way to live.

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[–] MelodiousFunk@slrpnk.net 72 points 2 days ago (2 children)

In Adelaide, the mercury hit 40C before 9.30am on Tuesday, after overnight lows of 35C

There are not enough swear words in my vocabulary to successfully articulate my reaction to that.

[–] Nebraska_Huskers@lemmy.world 11 points 1 day ago (3 children)

40c is 104F, it's not common but it happens where I live at least a few times a summer.

49c is 120F that wouldnt be fun

My state high happened near where I live in 1934. 118 degrees.

Personally I think the highest I've experienced is 112.

[–] MelodiousFunk@slrpnk.net 12 points 1 day ago (2 children)

The line I was reacting to stated an overnight low of 95. It was 104 by 9:30am. We've had stretches where it didn't dip below 85 (cycle of nightly cloud cover basically acting as a wet blanket) and it was absolutely miserable. A low of 95 is nightmare territory.

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[–] Taleya@aussie.zone 8 points 1 day ago

Can tell you're not an Aussie, seen 47/116 quite a few times

[–] Angelevo@feddit.nl 3 points 1 day ago (2 children)

That is nice for those who have been accused of having room temperature IQs in freedom units though.

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[–] HeyThisIsntTheYMCA@lemmy.world 11 points 1 day ago (11 children)

is that 49 wet bulb or 49 normal?

[–] Teppichbrand@feddit.org 13 points 1 day ago

I guess not as wet bulb 35 already kills humans

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[–] stoy@lemmy.zip 74 points 2 days ago (43 children)

Once temps hit more than 37C and 100% humidity, the human body loses the ability to regulate it's temperature through sweating.

[–] SirActionSack@aussie.zone 7 points 1 day ago

South Australia doesn't have humidity.

[–] dgriffith@aussie.zone 69 points 2 days ago* (last edited 2 days ago) (5 children)

I've worked in mines in the desert in South Australia where temps semi regularly hit 46-47 degrees.

It's OK (ish) because the humidity is low. But you can drink a litre an hour all day (11+ hours) and not need to pee. All that water goes somewhere.

The underground workings are often more dangerous, with lower temperatures but higher humidity. Once wet bulb temps get above 34 degrees underground personnel need to retreat from the area and the only work that can be done there then is work to fix the ventilation.

There's heat stress meters that measure wet and dry bulb temperatures and airflow, and can basically compute cooling power in watts. Not enough cooling power -> everyone out.

[–] stoy@lemmy.zip 35 points 2 days ago

I can only imagine, as I sit on the Stockholm metro with cold and damp feet after walking through snow and some slush to get to the bus earlier.

I am happy to hear that you have rules and regulations for these eventualities.

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[–] ms_lane@lemmy.world 30 points 2 days ago (1 children)

It's dry as a bone here right now. (That's good)

Also means it's all a big tinderbox. (That's bad)

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Yup. Wet-bulb conditions are no joke and can kill, making functioning A/C a life-saving technology if not an outright requirement for survival.

[–] Buffalox@lemmy.world 15 points 2 days ago* (last edited 2 days ago) (1 children)

Actually at 100% humidity the highest survivable temperature for a human is 35 C° wet bulb temperature.
But that is with everything else being perfect, being healthy, in the shade, and perfectly hydrated, and zero physical activity.
A more realistic maximum survivable wet bulb temperature is closer to 30 C°. But 35 C° is the absolute maximum, where above that everybody dies.

[–] myserverisdown@lemmy.world 7 points 1 day ago

Sorry, but that's wrong. WBGT takes radiative heat into effect when it's calculated. The sun and shade effectively have two different WBGT readings. That's why its measured with a black globe. Protocol is to measure ~2 meters heigh in direct sunlight away from structures that block wind so you get the worse case scenario. Like any whether reading, its localized.

[–] cyberpunk007@lemmy.ca 16 points 2 days ago (1 children)

Isn't this called wet bulb or something and lethal?

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[–] Honytawk@feddit.nl 16 points 1 day ago (1 children)

Damn, everything above body heat (37°C) is bad for your body.

[–] vrighter@discuss.tchncs.de 5 points 1 day ago (1 children)

at body heat is also bad for your body. There is no temperature difference so heat doesn't go into/out of your body.

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[–] LibertyLizard@slrpnk.net 47 points 2 days ago (8 children)

That's pretty damn hot. Around 120 F for those imperialists among us.

[–] JennyLaFae@lemmy.blahaj.zone 20 points 2 days ago

Dangerously hot, those are "fall and the sidewalk can burn you" temperatures.

good soldiers follow fahrenheit

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[–] Paranoidfactoid@lemmy.world 32 points 2 days ago (3 children)

I lived in Perth for several years and I've seen 45 degree heat there. It's a desert, so it's dry heat. But that's hot. Real hot. 49-50 is just insane.

[–] Damage@feddit.it 16 points 1 day ago

I live in Italy, in the valley around our biggest river. It's humid as fuck. Summers used to reach 32-35°C. Nowadays 40-45°C is not uncommon. Our offices are usually air-conditioned, but production areas aren't.

[–] phutatorius@lemmy.zip 16 points 1 day ago (1 children)

I worked in Saudi Arabia for several years. According to the law, people working outdoors can have a break when it gets over 50. Usually, that law was actually obeyed. Hottest I ever experienced was 52. You don't have to out in that for long in order for it to be lethal, even if, as in my case, I was running every day in the desert and somewhat acclimatized to it. I'd go at 6 AM because that's the only time it wasn't infernally hot. The Bedouins, who know a thing or two about surviving the local climate, would get under cover and minimize activity when it got that hot.

Now I live in southwestern England, where it seldom gets above 30. I'm fine with that.

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[–] tehn00bi@lemmy.world 7 points 1 day ago (2 children)

In Texas the hottest day I remember was 46 and that was miserable.

[–] Tollana1234567@lemmy.today 1 points 1 day ago (1 children)

texas is practically a desert though. if you have agaves, cactuses there its a sign.

[–] tehn00bi@lemmy.world 1 points 21 hours ago

That’s part of the state. It also has forests

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[–] ms_lane@lemmy.world 18 points 2 days ago

It was 'fun' at work. We don't have air con, just big sheds - plenty of ventilation though, it's not still and not in the sun.

It's workable, you've absolutely got to keep up with hydration, stop for a drink every ~10-15mins, keep the fan on you.

Double Wall 1L+ drink bottle is required, filled half with ice cubes to keep the water frosty.

Can't imagine how bad it'd be if it was humid.

[–] duncan_bayne@lemmy.world 15 points 2 days ago (5 children)

42-ish here in Belgrave. Current status: finished work, drinking a cold cider, then off to the pool.

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