Canada is warming at twice the global rate. Explore key findings from Canada’s Changing Climate Report 2026 on extreme heat, water security, and net zero.
Canada has warmed by 2.0°C over the past 75 years, nearly twice the rate of the global average, while the Canadian Arctic has heated up three times as fast. These findings form the core of Canada’s Changing Climate Report 2026 (CCCR2026), a comprehensive scientific assessment published by Environment and Climate Change Canada. Drawing on expanded observational datasets and updated climate modeling, the national assessment confirms that human influence, primarily through greenhouse gas emissions, is the sole plausible explanation for the widespread physical changes observed across the country’s atmosphere, land, and oceans.
For Canadians in everyday life, the report indicates that further climate change is already locked in for the immediate future. Between 2021 and 2040, average temperatures across Canada are projected to rise by roughly 1.0°C regardless of global emission choices, bringing Canadian warming to 2.7°C above pre-industrial levels.
This near-term shift will exacerbate existing environmental trends. Canadians can expect longer wildfire seasons, more frequent and severe heatwaves, and increased human-perceived heat stress. These changes are also altering seasonal energy demands, reducing winter space-heating requirements while substantially increasing summer cooling needs.
Changes to the water cycle present mounting challenges for infrastructure and seasonal water security. While total annual precipitation has increased nationwide by 9.7% since 1949, and by 18.9% in the North, its timing and nature are shifting. Earlier spring snowmelts, a higher ratio of rain to snow, and shrinking glaciers mean peak river flows are occurring earlier in the spring. As a result, summer freshwater availability in southern and central Canada faces heightened risks from longer and more intense seasonal droughts.
At the same time, short-duration extreme rainfall events are projected to intensify, increasing the frequency of urban flash flooding. Along Atlantic and western Arctic coastlines, rising relative sea levels, further enhanced by localized land subsidence, will drive more frequent extreme high sea-level events and coastal flooding.
For conservationists, land managers, and investors focused on nature-based solutions, CCCR2026 offers critical baseline data on ecosystem stability and carbon accounting.
Canada’s land and ocean ecosystems currently function as net carbon sinks, absorbing a portion of human-emitted carbon dioxide. However, the report cautions that the land carbon sink faces significant uncertainty in the coming decades. While higher temperatures and extended growing seasons may boost carbon uptake through increased vegetation growth, these gains could be offset or exceeded by carbon releases triggered by permafrost thaw, expanded wildfire burned areas, and insect disturbances.
The report highlights a key structural reality regarding Canada’s land carbon stocks: approximately 95% of terrestrial carbon is stored in soils, peatlands, and permafrost, while only about 5% is contained in living vegetation. Protecting these dense, underground soil carbon stores is therefore identified as a vital priority for maintaining current carbon stability.
The report delivers a clear scientific conclusion for the future of nature-based climate solutions like wetland restoration, avoided conversion of natural lands, and tree planting: nature-based approaches play a complementary in overall climate mitigation. The report estimates that protecting existing natural carbon stocks and expanding carbon sinks through NBCS could achieve up to 78 megatonnes of CO2e drawdown annually after 10 years of implementation. While valuable, the assessment stresses that nature-based strategies cannot replace the deep industrial emissions cuts required to stabilize global temperatures.
The report also details profound changes in Canada’s marine and frozen environments:
Ocean degradation: Oceans surrounding Canada are warming, losing subsurface oxygen, and acidifying as they absorb atmospheric carbon dioxide. Marine heatwaves in the Pacific and Atlantic have become more frequent and intense since the 1980s, posing ongoing risks to marine food webs and coastal fisheries.
Glacier retreat: All glaciers in western Canada and the Arctic have lost mass over the past two decades. In western Canada, more than 55% of glacier ice volume is projected to disappear by 2100 even if global warming is limited to 2.0°C, and more than 75% will be lost under current global policy trajectories, permanently reducing a critical source of late-summer streamflow.
Sea ice and permafrost: The sea ice-free season in northern waters is expanding by roughly one month for every additional degree of global warming. Meanwhile, permafrost thaw is reshaping northern landscapes, altering hydrology, and damaging northern infrastructure.
In the second half of the century, the magnitude of climate impacts in Canada will depend entirely on global greenhouse gas trajectory:
Current global policies scenario: If global emissions follow current policy trends, Canadian average warming is projected to reach 5.0°C above pre-industrial levels by 2081–2100, with winter warming in parts of Nunavut potentially exceeding 10°C.
Net-zero scenario: If global CO2 emissions decline to net zero around 2075, Canadian temperature trends will stabilize in the second half of the century at approximately 3.5°C above pre-industrial levels.
The report concludes by highlighting the multi-century persistence of climate impacts. While air temperatures and sea ice cover will stabilize once global net-zero emissions are sustained, slow-responding systems, including deep-ocean sea-level rise, permafrost thaw, and glacier melt, will continue for centuries. As a result, long-term adaptation planning will remain essential across all regions of Canada regardless of the speed of global mitigation.
💡 This national assessment aligns with a milestone report released by the United Nations Environment Programme (UNEP), which formally acknowledged that temporarily exceeding the 1.5°C Paris Agreement warming threshold is now unpreventable in the coming years. Marking a strategic pivot in international climate policy, the UN’s assessment stresses that while an overshoot above 1.5°C is now inevitable, the global directive must shift immediately to containment, limiting peak global warming to no higher than 1.8°C and accelerating emissions cuts to bring temperatures back down by the end of the century. For Canada, this international turning point reinforces that near-term adaptation and rapid industrial decarbonization are no longer distant targets, but immediate national imperatives.
💡 For North American businesses and corporate leaders, the physical realities outlined in the report translate directly into operational, financial, and supply-chain risks across integrated cross-border markets. Compounding physical hazards like extreme heatwaves, shifting water availability threatening resource-intensive manufacturing, and expanding wildfire seasons disrupting trade corridors demonstrate that climate exposure is an immediate operational efficiency and asset management concern. Beyond internal adaptation, corporate leaders can accelerate broader decarbonization by establishing formal supply-chain emission tracking, integrating environmental risk metrics into financial decision-making, and investing in sustainable land management and nature-based infrastructure projects that protect critical soil and forest carbon reservoirs.
