Was that -90F or -90C? Care to make any predictions about when that will happen? Be careful not to be too specific. Climate Deniers keep having to change the Century and Year in their "Global Warming ended in CCYY" predictions.

https://en.wikipedia.org/wiki/Geography_of_Toronto#Severe_weather_and_records
"The coldest minimum temperature of −33 °C (−27 °F) was recorded on January 10, 1859. The coldest temperature recorded at Toronto Pearson International Airport was −31.3 °C (−24.3 °F) on January 4, 1981..."

https://en.wikipedia.org/wiki/Geography_of_Toronto#Upward_temperature_trend

https://en.wikipedia.org/wiki/Ottawa#Climate
"The coldest temperature ever recorded was −38.9 °C (−38 °F) on 29 December 1933."

Both record cold figures leave a long way to go to -90. Were you counting on the glaciation Cycle? The GHG effect is stronger.
http://ossfoundation.us/projects/environment/global-warming/milankovitch-cycles
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