It was a beautifully sunny day Sunday in Hamilton, but it was far from warm. 

Environment Canada issued an extreme cold warning for Sunday and Monday, saying the "bitterly cold Arctic air" mixed with gusty winds could leave the air feeling as cold as –30 and –40 C Sunday evening and Monday morning. 

The warnings come when the cold temperatures or wind chill heightens the risk of frostbite and hypothermia. 

The winds were expected to be as strong as 30 to 50 km/h Sunday afternoon, dying down in the evening.

Environment Canada warns that outside activities require more caution than usual on Sunday and into Monday. "Frostbite on exposed skin may occur in just a few minutes," the forecaster warned.

Pay extra attention if you or your family members experience any of these symptoms, Environment Canada said:

  • Respiratory: shortness of breath, wheezing and cough
  • Cardiovascular: chest pain and arrhythmias
  • Circulation: colour change of finger and toes, pain, numbness and tickling sensation in extremities
  • Muscle: pain, stiffness, swelling, restricted movement, weakness
  • Skin: itching, pale.

Get inside to warm up if you experience any of these. 

Heading outside regardless of the cold today? Send us a photo @CBCHamilton on Twitter, Instagram, Facebook or email of how wisely you bundle up. Bonus for the least amount of bare face showing.

Like this photo from Nicole Pocsai:

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