The Heat Score for Canada, powered by AISIX, uses a downscaled, bias corrected, multi-model ensemble for maximum daily temperature by mid-century for a middle-of-the-road climate change scenario (SSP2). The dataset simulates future temperatures at a 10km scale.

To make the temperature values easier to understand, Aisix classified them into 5 classes. The classification is based on statistical distribution of temperature values. Each class is defined by the rounded 10th percentile breaks above the mean temperature (27 °C) below the 60th parallel.

The data adequately captures future trends in regional temperatures, but further extremes should be expected at finer scales. This is because the operating resolution of climate model products combines and averages intricate terrain and atmospheric features such as mountainous terrain and urban heat islands into larger grid cells. The SSP2 climate change scenario assumes that socio-economic trends do not shift significantly from current global patterns. This climate change scenario represents a middle ground between a low-warming future characterized by proactive societal mitigation of a changing climate, and a high-warming future that does not mitigate climate change in pursuit of socio-economic development.

Aisix derives heat scores from global circulation models.

Heat Fact: when assessing heat risk to human health, a combination of humidity and heat called humidex is used instead of just measured temperature.



To enhance the accuracy and transparency of the probabilities, we have implemented a classification system consisting of five distinct levels: 1 to 5, corresponding to daily maximum temperatures:

Please Note:
AISIX scores are driven by probabilities, which means they are not certain. It’s important to be careful when understanding these scores. Remember that even if something is likely, it is not guaranteed. The opposite is also true. To understand more, please read AISIX disclaimers.



  1. What is a heat risk score?
    Aisix’s heat risk score represents how high temperatures will be by 2050 for a given location compared the average for Canada. The higher the score, the higher the maximum temperatures by mid-century, the higher the heat risk.
  2. How often is the heat risk score updated?
    Heat risk scores are typically updated annually to reflect new data and environmental changes. 
  3. Is my property’s heat risk score based on current weather conditions?
    While the base score incorporates historical and geographical data, it may not reflect real time conditions.
  4. Can the heat risk score change over time?
    Yes, the score can change due to factors like climatic changes and improvements in risk assessment technologies. Regular updates incorporate these changes to keep the score as accurate as possible.
  5. Who can I contact for more detailed information about my property’s heat risk?
    For more detailed information, contact
  6. What should I do if I disagree with my heat risk score?
    If you disagree with your score, you can request a review or reassessment. 


Climate Data Disclaimer

The climate data provided on this website is intended to furnish users with general information on the potential impacts of climate-related factors on property values and conditions. This data is
derived from various sources, which may include governmental meteorological agencies, climate change models, and other third-party data providers.
Accuracy and Limitations: AISIX endeavors to offer up-to-date and accurate climate data; however, due to the inherent variability of climate and weather patterns, we cannot guarantee the
absolute accuracy or completeness of this data. The information is provided "as is" without warranty of any kind, either express or implied.
Not a Substitute for Professional Advice: The climate data presented should not be construed as professional real estate, legal, or financial advice. It is intended for informational purposes only,
and should not be relied upon for making decisions regarding real estate transactions or investments. We strongly recommend consulting with a professional real estate advisor or a climate
resilience expert to obtain specific advice tailored to your individual circumstances.
No Liability: Under no circumstances will AISIX be liable for any direct, indirect, incidental, special, consequential, or exemplary damages arising out of or in connection with the use of the climate
data provided. This includes, but is not limited to, damages for loss of profits, goodwill, use, data, or other intangible losses.
Changes and Updates: The climate data on this website may be updated periodically. They reserve the right to make changes or updates at any time without prior notice.
Contact Us: If you have any questions or concerns about the climate data or its implications for a specific property, please contact the AISIX support team at:
By accessing and using the climate data on this website, you acknowledge and agree to the terms set forth in this disclaimer.