52 degrees Celsius is 125.6 degrees Fahrenheit. That's hot no matter how you measure it.
Where I used to live in the desert we had about two weeks every year with temps over 120 degrees F. I once experienced walking in 128 degree weather. Not good for humans at all.
I hope the weather cools soon -- that is hot enough to keep wild fires burning for a long time, hot enough to kill people. Poor Australia!