Western heat, drought and fire year

A conditional statement under stated assumptions, never a prediction.

2 min read0 figures0 tables3 notesNR-COUNTRY-CAN-2026-BASELINE

Contents
  1. ·Edition home
  2. ·Executive summary
  3. 1Canada’s risk is coupled, not cumulative
  4. 2Key findings
  5. 3Systems and sectors at baseline
  6. 4Risks and capability
  7. 5Western heat, drought and fire year
    1. 5.1 Assumptions
    2. 5.2 The cascade, step by step
    3. 5.3 The scenario as a table of steps
  8. 6Lenses and readings
  9. 7The 2027 agenda
  10. 8Systems in depth
  11. AMethodology
  12. BData appendix
  13. CReferences and record
  14. ·Complete edition, for print

5.1Assumptions

Scenario SCN-CAN-HDF-01: what is assumed, and what is held constant.

Baseline
the 2026 reference state in this edition
Drivers
a second consecutive low-snowpack winter in British Columbia and Alberta; a heat dome of 2021 magnitude in late June; an early and intense fire season
Analogues
2021 heat dome and Prairie drought; 2023 fire season
Interventions
none modelled, the specification describes the unmitigated case
Run state
narrative specification; quantified Foundry run scheduled for Q1 2027

5.2The cascade, step by step

  1. 1

    CLI → WAT

    low snowpack and heat cut summer flows and reservoir inflow

    2023 low water

  2. 2

    WAT → ENE

    lower hydro output; imports at peak prices

    2023–2024

  3. 3

    CLI → HLT

    heat deaths and emergency visits; cooling in care settings

    2021 heat dome6

  4. 4

    BIO → HLT

    smoke over Prairie and BC cities for weeks

    2023 season10

  5. 5

    WAT → FOO

    canola and wheat yields fall by a third or more

    2021 drought20

  6. 6

    CLI → INF

    fire and heat slow rail operations; export delays

    2021 · 2023

5.3The scenario as a table of steps

How the shock in scenario SCN-CAN-HDF-01 would travel through Canada’s coupled systems, step by step, under the assumptions the edition states.

StepWhat happensSource
01 Climate to waterLow snowpack and heat cut summer flows and reservoir inflow. Analogue or source: 2023 low water.Edition CAN, scenario SCN-CAN-HDF-01, step 1
02 Water to energyLower hydro output; imports at peak prices. Analogue or source: 2023–2024.Edition CAN, scenario SCN-CAN-HDF-01, step 2
03 Climate to healthHeat deaths and emergency visits; cooling in care settings. Analogue or source: 2021 heat dome [6].Edition CAN, scenario SCN-CAN-HDF-01, step 3
04 Biodiversity to healthSmoke over Prairie and BC cities for weeks. Analogue or source: 2023 season [10].Edition CAN, scenario SCN-CAN-HDF-01, step 4
05 Water to foodCanola and wheat yields fall by a third or more. Analogue or source: 2021 drought [20].Edition CAN, scenario SCN-CAN-HDF-01, step 5
06 Climate to infrastructureFire and heat slow rail operations; export delays. Analogue or source: 2021 · 2023.Edition CAN, scenario SCN-CAN-HDF-01, step 6

A teaching model of a conditional scenario under the edition’s stated assumptions: not a forecast, not a prediction and not a warning. Sources: Canada 2026, scenario SCN-CAN-HDF-01 (2026); Canada 2026, references (NR-CIT-1) (2026).

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

  1. 6BC Coroners Service (ed.), Extreme Heat and Human Mortality: A Review of Heat-Related Deaths in B.C. in Summer 2021. Government of British Columbia, Victoria, 2022.back
  2. 10Natural Resources Canada (ed.), Canada’s record-breaking 2023 wildfire season. Canadian Forest Service, Ottawa, 2024.back
  3. 20Statistics Canada (ed.), “Production of principal field crops, November 2021.” The Daily, Ottawa, December 2021.back

Cite this chapter

Valadbaygi, S. (Ed.). (2026). Chapter 5: Western heat, drought and fire year. In Canada Systems Risk and Resilience Report 2026: The State of Canada’s Interdependent Systems (Baseline Edition 2026, Report No. NR-COUNTRY-CAN-2026-BASELINE) [Draft under review]. The Global Centre for Risk and Innovation (GCRI).

Every citation form of the whole report, BibTeX and RIS included, is on the edition home. Cite this report

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Sector signature

The sectors behind Canada.

A reading aid: the sectors the findings run through and how strongly they depend on each other.

Select corners · hover lines6 / 15 relations

Context

Heatwave

Cooling demand peaks the grid while rivers warm; heat stress fills hospitals and wilts crops.

W · E · I · F · H · B

Sectors
4 of 6
Relations
6 of 15
Coupling
0.43 share of total

Strongest relations in play

  • Water → Energy · cooling water and hydropower0.6
  • Water → Food · irrigation0.8
  • Food → Health · nutrition0.7
  • Water → Health · drinking water and sanitation0.7
Teaching values for a typical city-region, not measurements for any place. Coupling is the summed strength of the relations in play, as a share of all fifteen.
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