Hurricane Juan
The cause of the hurricane was the temperature of the Atlantic Ocean. Normally, the cool waters of the Atlantic Ocean cause hurricanes to dissipate as they head north, but that day, the water had been 3°C warmer than the average temperature, causing the hurricane to instead, speed up and accelerate, which caused it to hit Halifax and other parts of Nova Scotia with unusually strong gusts of wind reaching over 185 km/h, heavy rain, and surf.