On Wed, 14 Nov 2018 19:03:53 -0800 (PST), True North wrote:

Winter is still about 5 weeks away but man it's been cold the last couple of days...and strong wings gusting close to 100 km are really making it bad.
Fall used to be our best season but endless rain and now drastic cold are taking that away.
Must be that global weather shifts that many keep denying.

https://www.cbc.ca/ns/weather/s0000318.html

Who is denying climate change?

The word 'that' is used to modify a singular noun, not plural.

You would not say, "That dogs that run." You would say, "Those dogs that run."

Eventually you'll learn.