ThatOwlWoman
Leftist Vermin
"on record". Our global temperature records date back to the 1970s. That's it. That's all that means 'hottest year in 50 years'.
They date back to the mid-1800s in most long-settled urban areas. Here, they date back to the late 1800s. You don't need a thermometer to tell that the climate has changed from even just 50 years ago. You only have to be able to have observed bird, plant, and animal changes and ranges in that time period, which spans most of your life and mine too.