Extreme Weather

Extreme weather ahead

As global temperatures continue to rise and the world's climate continues to destabilize, cities around the world are experiencing more extreme and unusual weather events including extreme temperatures, precipitation, droughts and storms. The incidence of extreme weather is expected to increase in frequency and severity in the years to come.

By 2050, Toronto is expected to see:

  • the maximum daily temperature rise to 44°C, from 37°C today;
  • 66 days above 30°C, versus 20 days today;
  • four times as many extended heatwaves per year; and
  • significantly more intense rainfalls, with the daily maximum rainfall rising to 166 mm, from 66 mm.


Image of Toronto's Future Weather based on the Climate Driver Study conducted in 2011. Daily average temperature will increase from 37 degrees (2000-2009) to 44 degrees (2040-2050). The number of hot days above 30 degrees will increase from 20 (2000-2009) to 66 (2040-2050). Extended heat waves will increase three-fold while the daily rainfall maximum will increase from 66 millimetres (2000-2009) to 166 millimetres (2040-2050).

                *Source: Toronto's Future Weather and Climate Driver Study, 2011.


Know the risks, take action, improve your resilience 
Extreme weather can occur at any time, with little warning. As the City takes action to improve our overall resilience to climate change and extreme weather, it's important for Toronto residents and businesses to do the same. 

This website brings together information from a variety of sources — including City divisions, agencies and external organizations — to help you:   

  • understand the risks and potential impacts of extreme weather
  • take steps to weather-proof your home and protect your family
  • access the programs, subsidies and resources available to help you.

To learn more and get started, click on one of the extreme weather tabs, above.

Check out Canada's top 10 weather stories of 2015.