Anyone claiming (as quoted above) that a temperature is twice as hot as something else needs to learn some basic physics.
Look at the three temperature scales in modern use – and take a figure such as 10 degrees. Twice as hot would be 20 degrees, you might imagine, but this gives quite different real temperatures in each case. Now try it with a below zero figure … Twice as hot as -10 is, in F, C, K, respectively, verty cold, quite cold, and impossible.
Unless, of course, the text came from a politician or a marketing person, then you would know it was a load of testicles, of course.
Cheers, Tim