Public Health

Since it affects the social determinants of health - clean air, clean water, food and housing security - climate change can have direct and indirect effects on health.

Case Studies

Explore case studies to learn about how data was used to impact climate related decisions in specific contexts.

Lyme disease in Ontario

Lyme disease incidence is increasing in Ontario, particularly in the eastern part of the province. This trend is likely to continue as climate change progresses.

Explore

Variables related to Public Health

Explore variables to learn about how data was used to impact climate related decisions in specific contexts.

This is the highest maximum temperature value in this time period. For more information of the source data and figures, click here.

 


Mean temperature is the average temperature on a given day and is usually obtained by averaging the daily maximum and minimum temperatures. For more information of the source data and figures, click here.


This is the average minimum temperature for a given time period and is derived by averaging all the daily minimum temperatures in that time period. For more information of the source data and figures, click here.


This is the number of days when daily maximum temperature is greater than 25°C and gives an indication of the number of summer days. For more information of the source data and figures, click here.


This is the number of days when daily maximum temperature is greater than 27°C. For more information of the source data and figures, click here.


This is the number of days when daily maximum temperature is greater than 29°C. For more information of the source data and figures, click here.


This is the number of days when daily maximum temperature is greater than 30°C and gives an indication of the number of very hot days. For more information of the source data and figures, click here.


This is the number of days when daily maximum temperature is greater than 32°C. For more information of the source data and figures, click here.


Growing degree days are a measure of whether climate conditions are warm enough to support plant growth. When the daily mean temperature exceeds the threshold temperature, growing degree days are accrued. A threshold temperature of 10°C is generally used for crops such as corn and beans that require warmer temperatures to reach maturity. For more information of the source data and figures, click here.


Growing degree days are a measure of whether climate conditions are warm enough to support plant growth. When the daily mean temperature exceeds the threshold temperature, growing degree days are accrued. A threshold temperature of 5°C is generally used for forage crops and canola. For more information of the source data and figures, click here.


Cumulative degree-days above 0°C are calculated by adding average daily temperature over a defined time period (e.g. a year or month) for those days when the mean temperature exceeds 0°C. This index can be used as an indicator for plant and insect growth.  The warmer the weather, the more quickly these species develop, and the cooler the temperature, the slower they develop. For more information of the source data and figures, click here.


The number of tropical nights refers to the number of days when the minimum temperature (which usually refers to night-time temperature) value does not go below 18°C. For more information of the source data and figures, click here.


The number of tropical nights refers to the number of days when the minimum temperature (which usually refers to night-time temperature) value does not go below 20°C. For more information of the source data and figures, click here.


The number of tropical nights refers to the number of days when the minimum temperature (which usually refers to night-time temperature) value does not go below 22°C. For more information of the source data and figures, click here.