Lightning Storms: Environment Canada's ability to monitor lightning is still in its relative infancy, with the first reports starting in 1998. During the time frame 1998 to 2002, the Region experienced an average of 25 to 30 days per year in which the Region experienced cloud to ground lightning, with an average of 1 to 2 strikes per km2. Local power outages and roads blocked by trees are common occurrences during these periods of intense lightning.
Tornadoes: Environment Canada recorded 44 tornadoes in and around the Region between 1979 and 2002, placing Waterloo in the highest range for Ontario. As the Region continues to increase in both population and urbanization, it seems more likely that more and more of the tornadoes will strike built-up areas.
Windstorms: Between 1979 and 2002, Environment Canada recorded 67 events within the Region in which wind gusts equal to or greater than 90 km/hour occurred, or an average of almost 3 events per year. Downed distribution lines and hazardous driving conditions increase during these periods.
Extreme Heat: Temperatures continue to climb, with the average number of days with temperatures equal to or greater than 30°C within the Region reaching 5. Environment Canada statistics show this trend towards warmer temperatures, with a concurrent effect upon vulnerable populations and energy consumption. The same statistics show a positive correlation between temperature increases and increases in air pollution.