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It was 48.9C last Tuesday in Port Augusta, South Australia, an old harbour city that now harvests solar power. Michelle Coles, the owner of the local cinema, took off her shoes at night to test the concrete before letting the dogs out. “People tend to stay at home,” she said. “They don’t walk around when it’s like this.”It’s easy to see why: in the middle of the day it takes seconds to blister a dog’s paw or child’s foot. In Mildura, in northern Victoria, last week gardeners burned their hands when they picked up their tools, which had been left in the sun at 46C. Fish were dying in the rivers.

Almost every day last week a new heat record was broken in Australia. They spread out, unrelenting, across the country, with records broken for all kinds of reasons – as if the statistics were finding an infinite series of ways to say that it was hot.

The community of Noona – population 14 – reached the highest minimum ever recorded overnight in Australia – 35.9C was the coldest it got, at 7am on Friday. It was 45C by noon.

A record fell on Tuesday in Meekatharra in Western Australia – the highest minimum there ever recorded (33C). Another fell on Wednesday, 2,000 miles away, in Albury, New South Wales – their hottest day (45.6C).

It was 45C or higher for four consecutive days in Broken Hill – another record – and more than 40C for the same time period in Canberra, the nation’s capital. Nine records fell across NSW on Wednesday alone. Back in Port Augusta, Tuesday was the highest temperature since records began in 1962………..

In South Australia, they declared a “code red” across Adelaide, the state capital. Homelessness services were working overtime and the Red Cross started calling round a list of 750 people who were deemed especially vulnerable

At the Australian Open in Melbourne, only the sea breeze kept the temperature below 40C. At Adelaide’s Tour Down Under, a bike race, it was 41C.

On Monday last week the hottest spot in New South Wales was Menindee, a river town that feeds the country’s largest water system, the Murray-Darling basin. It was 45C. It climbed to 47C on Wednesday, and by Thursday the fish were gasping.

Australia’s native Murray cod can live for decades under normal conditions, growing all the while. The oldest are a metre long, with heavy white bellies that have to be held with both hands. Last week, hundreds died, choked of oxygen due to an algal bloom that fed and grew in the heat, and collapsed when temperatures dipped.

Blue-green algae flourishes in hot, slow-moving water. Then, when temperatures inevitably drop, the algae dies and becomes a food source for bacteria, who multiply and starve the river of oxygen. The fish rise to the surface.

The mass fish death has reignited a debate over water management in the region, where cotton farmers upstream have been accused of taking more water than they should.

The heat is not the root cause, the locals stress. But the five punishing days settling over the river have not made it better. Last Thursday the cod were up near the surface and struggling. On Friday, it was 45C again. In Menindee, the locals believe the fish kill will happen again, with temperatures in the 40s expected to continue into this week. The water will be running hot……….https://www.theguardian.com/australia-news/2019/jan/19/australia-swelters-as-relentless-hot-weather-smashes-records