The Neurological
Climate Emergency
Climate change is one of the most urgent and least-recognized threats to brain health of our time. As wildfires, heat events, and air pollution intensify across Canada, their profound impact on the brain is being ignored. The most vulnerable among us are paying the highest price.
Explore the Evidence βHow Climate Change Attacks the Brain
A rapidly expanding body of peer-reviewed evidence links climate hazards directly to neurological and psychiatric outcomes. This is not a future risk β it is already happening across Canada.
Extreme Heat
Heat is the most well-documented climate hazard for the brain. Rising temperatures increase stroke risk, trigger migraines, exacerbate epilepsy and MS, and dramatically increase hospitalizations for people with dementia. Even rapid temperature fluctuations carry elevated stroke risk.
Wildfire Smoke & PM2.5
Fine particulate matter from wildfires and industrial pollution crosses the blood-brain barrier, triggering neuroinflammation. Long-term exposure is associated with higher rates of dementia, stroke, Parkinson’s disease, cognitive decline, and anxiety. Canada faces some of the world’s most intense wildfire smoke seasons.
Vector-Borne Disease Expansion
Climate change is expanding tick and mosquito habitats northward into previously unaffected Canadian regions. Lyme disease, West Nile virus, and other vector-borne illnesses can cause severe neurological complications including encephalitis, meningitis, and chronic cognitive impairment.
| Climate Hazard | Neurological Conditions Affected | Primary Mechanism | Highest-Risk Populations |
|---|---|---|---|
| Extreme Heat | Stroke, Dementia, Epilepsy, MS, Migraine | Hyperthermia, dehydration, cardiovascular stress, neuroinflammation | Older adults, people with dementia, outdoor workers, those without air conditioning |
| Wildfire Smoke / PM2.5 | Stroke, Alzheimer’s, Parkinson’s, Anxiety, Cognitive decline | Blood-brain barrier penetration, oxidative stress, neuroinflammation | Indigenous communities near fire zones, rural populations, children, people with APOE risk alleles |
| Floods & Disaster Events | PTSD, Depression, Anxiety, TBI | Physical trauma, displacement, chronic psychological stress | Residents of flood-prone areas, low-income communities, newcomers to Canada |
| Tick/Mosquito-Borne Illness | Lyme neuroborreliosis, Encephalitis, West Nile neuroinvasion | Direct CNS infection, post-infectious neurological damage | Rural and peri-urban residents in expanding tick habitats |
| Chronic Air Pollution | Parkinson’s disease, Dementia, Cognitive impairment | Systemic inflammation, oxidative stress, neurotoxicity | Urban low-income neighbourhoods, communities near industrial zones |
The Rising Tide of Climate Anxiety
Beyond the physical impacts, climate change is a profound and growing psychological stressor β one that demands clinical attention and a systemic public health response.
Climate Anxiety & Eco-Anxiety
Chronic fear, grief, and distress about the accelerating climate crisis β particularly prevalent among youth. This is not pathological alarmism; it is a rational response to a genuine emergency that clinicians need tools to address.
Post-Traumatic Stress Disorder
Survivors of climate-fuelled disasters β wildfires, floods, hailstorms β experience PTSD, depression, and anxiety at significantly elevated rates. The 2020 and 2023 Calgary hailstorms documented elevated mental health impacts among 88.5% of affected residents in affected neighbourhoods.
Solastalgia
Emotional distress caused by environmental change in one’s home environment β a feeling of loss for a once-familiar landscape. Being documented in First Nations communities across Canada facing unprecedented land and resource disruption.
Pre-Traumatic Stress
Anticipatory grief and dread about future climate scenarios β an emerging psychological reality. Dr. Christine Gibson, Brain-CE’s Director of Innovation and trauma therapist, has written extensively on this in The Modern Trauma Toolkit.
“We’re stuck in feedback loops where we’re so embedded in the status quo that we can’t conceive of what could benefit the social good. Social innovation means asking: what do we want to build from the embers?”
β Dr. Christine Gibson, Director of Innovation, Brain-CEOur Clinical Response
Brain-CE is developing clinical screening tools, community resilience frameworks, and care pathways for Canadians experiencing climate-related psychological distress.
This Crisis Is Not Felt Equally
Systemic injustices ensure that equity-denied communities bear the greatest burden of climate-related neurological harm β while having the least access to information, healthcare, and adaptation resources.
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ποΈOutdoor Workers Cannot escape heat or wildfire smoke during working hours. Disproportionately racialized and newcomer workers face maximum exposure with minimum protection and the fewest legal safeguards.
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πLow-Income Households & Seniors Often lack air conditioning or filtration. In Calgary’s Northeast “hailstorm alley” β predominantly newcomer communities β repeated climate shocks combine with insurance exclusions and language barriers to compound harm.
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πΏIndigenous Communities On the front lines of land, water, and resource disruption. Disproportionately affected by wildfires and displacement. Face compounded barriers to neurological care and culturally unsafe health systems.
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βΏPeople with Disabilities & Neurological Conditions Greater physiological vulnerability to heat and air quality changes. Higher risk during evacuation failures. Existing conditions amplified by environmental stressors, while climate policy seldom considers their needs.
Relative Climate Risk Exposure
Relative exposure based on synthesis of peer-reviewed literature. Illustrative.
Key finding: In Canada and the US, air pollution exposure disparities closely mirror racial and income geography β communities of colour breathe measurably worse air. This is the direct product of inequitable land use and urban planning decisions. (Jbaily et al., Nature, 2022; Morello-Frosch & Obasogie, NEJM, 2023)
While the United Kingdom, Australia, and the European Union have begun integrating brain health into their climate adaptation strategies, Canada lags far behind. There is no coordinated national research agenda, no clinical guidance for practitioners, and no public health messaging connecting climate events to neurological risk.
The Brain Climate Equity Collaborative was founded in 2025 to fill this critical gap β generating the evidence, raising awareness, and driving the systemic change needed to protect every Canadian brain in a changing climate.
Our Story & Mission βNo national strategy addressing climate-neurological health intersections. Fragmented, reactive clinical practice. No public health messaging. Equity gaps in climate adaptation largely unaddressed. Brain-CE is the first initiative to take on this nationally.
Lancet Countdown reports explicitly track climate impacts on neurological health. NHS climate adaptation plans reference neurological vulnerability groups. Academic-clinical partnerships advancing rapidly.
National heat health alert systems explicitly address neurological risk groups. Research funding connects bushfire smoke to cognitive outcomes. Community-based clinical interventions underway.
The Time to Act Is Now
Canada’s window to get ahead of this crisis is closing. Join our growing community of researchers, clinicians, advocates, and community members building the national response that is urgently needed.