and even the risk for tornadoes accompanying the storm threat. Following Tuesday's thunderstorms across Alberta, the severe weather risk now shifts towards southern Manitoba and northwestern Ontario.

Severe thunderstorms erupted over parts of the Prairies to end the weekend, with six concurrent tornado warnings in place for Saskatchewan at one point through the evening on Sunday. PHOTOS ...

As if they aren’t already facing enough, firefighters in California also could encounter fire tornadoes — a rare but dangerous phenomenon in which wildfires create their own weather.