The word decline in this headline is utterly ambiguous.

- Hot and cold tenps lowered

- Hot lowered and cold rose

- Extremes were less significant

- Extremes were more spikey

Then there's the nonsense figure of speech "US climate sees"

Finally, what's significant about 1899?

When a headline invokes a litany of questions that confuse or betray it, you've encountered clickbait noise.