Need to warm up? At -11 C, Goderich is Ontario's hot spot
Elsewhere in Ontario, the mercury has plummetted down as low as -29 C
The weather is making big news across Ontario today and if you head outside, you'll know why.
Environment Canada has issued an extreme cold weather alert, meaning there's an increased chance of suffering frost bite, hypothermia or other health risks associated with the cold.
In the London region, temperatures are hovering between -16 C and -21 C with the wind chill factor making it feel like -30.
"Cold puts everyone at risk," stated Environment Canada in its warning. The agency is directing people to cover up to protect themselves from frost bite, which can develop within minutes of exposure.
It's also reminding people to check on older friends, family and neighbours.
All <a href="https://twitter.com/hashtag/LdnOnt?src=hash&ref_src=twsrc%5Etfw">#LdnOnt</a> Library locations are open regular hours today <a href="https://twitter.com/hashtag/LdnOnt?src=hash&ref_src=twsrc%5Etfw">#LdnOnt</a> Drop by to play, catch up, stock up and stay warm. <a href="https://t.co/wULbA1cZGz">pic.twitter.com/wULbA1cZGz</a>—@londonlibrary
Public health units in Ottawa and Toronto have issues safety alerts. In London, city services are closed until Jan. 2.