doesn't make sense
Article says
"Hard disks are seldom rated to run at more than 50 degrees Celsius, and as the mercury topped 40 degrees in London yesterday it’s not hard to imagine that temperatures became so hot that mechanical disks in a densely packed device faced an extreme environment and suffered more than solid state components."
It's very hard to imagine in fact, it's not as if these systems are running under a big tree outside there is air moving in the facility, and at the very least air moving in the chassis.
Add to that most modern spinning drives (at least the ones I have from Western Digital which are "Enterprise" SATA) are rated for 60C / 140F AMBIENT. My own personal drives I have run as hot as 91.5F ambient and the drive temps ranged from 107-120F. Not sure how hot the drives would be running 50F hotter ambient than that.
Add to that such systems must have thermal shutdown features to protect the systems from damage regardless.
Seems like many failures here.