Climate change is already affecting human health and, according to the article, is making many people with chronic illness sicker. The author draws on personal experience and published research to outline multiple mechanisms — heat extremes, wildfire smoke and particulate pollution, floods and mold, expanding ranges of disease vectors, and altered conditions for foodborne pathogens — that can exacerbate preexisting conditions or contribute to new long-term illness.
The piece highlights research linking inhalation of particulate matter, the primary pollutant in wildfire smoke, to worsening and incident autoimmune and rheumatic conditions. Cited findings include worsening symptoms in people with lupus, new cases of rheumatoid arthritis, and associations with RA-associated interstitial lung disease. The author also notes research associating high particulate exposure with risks for multiple sclerosis, Parkinson disease, diabetes, and asthma. These reported associations are used to explain the author’s own experience of increased joint pain during heavy smoke events despite indoor air precautions.
Heat waves can cause direct harm and amplify chronic disease risk. The article references a recent European heat wave that is estimated to have caused around 10,000 deaths and notes that people with heart disease, diabetes, and thyroid disease are at greater risk for heat-related illness. Certain medications (for example, beta blockers and some antidepressants) also increase vulnerability in hot conditions.
Beyond immediate heat illness, the article cites research suggesting that high temperatures may impair immune function and compromise epithelial barriers in the lungs, skin, and gut. Disruption of these protective barriers could plausibly contribute to allergies, autoimmunity, and other health problems, according to the cited studies.
Increased frequency and severity of flooding are linked to mold growth and exposure to environmental contaminants. The author reports that mold can trigger allergies, nausea, and worsening of illnesses such as long Covid and myalgic encephalomyelitis. Flood remediation activities can also expose people to lead paint and asbestos. The article summarizes established health impacts of these toxins: lead exposure is associated with kidney damage, hypertension, and persistent cardiovascular issues in adults, while asbestos exposure can lead to lung diseases including cancer.
Warming temperatures are expanding the geographic ranges of ticks and mosquitoes that transmit pathogens such as West Nile virus, Lyme disease, dengue, and chikungunya, as well as conditions like alpha-gal syndrome. The article stresses that while many vector-borne illnesses have treatments, delayed detection increases the risk of long-lasting symptoms.
The author also discusses climate influences on foodborne pathogens. Examples include faster maturation of cyclospora in warmer conditions and experimental findings that higher humidity can aid survival and replication of bacteria like salmonella on produce. The article cites research predicting that combined effects of rising temperatures and shifting humidity patterns will increase overall prevalence of pathogenic contamination on food, which can precipitate acute infections that sometimes lead to chronic gastrointestinal and autoimmune conditions.
The author describes lived experience with multiple chronic conditions — including psoriatic arthritis, endometriosis, Celiac disease, Graves and Hashimoto’s diseases, and interstitial cystitis — and reports symptom flares associated with smoke exposure, cold damp weather, and heat. She recounts multiple episodes of food poisoning in 2019 that led to small intestinal bacterial overgrowth and months of weight loss and illness; around the same period she developed widespread symptoms of psoriatic arthritis. The article notes research that links certain infections to later development of Crohn’s disease, ulcerative colitis, Guillain-Barré syndrome, and other autoimmune disorders, while acknowledging that individual causation is not definitively established in the piece.
The author argues that, because the climate is already altered, responses must focus on resiliency and system-level preparedness rather than relying solely on emission reductions. Specific recommendations in the article include:
Strengthening and adequately funding public health agencies that track pathogen spread and predict disease emergence, rather than reducing their capacity.
Increasing support for meteorological organizations such as the National Oceanic and Atmospheric Administration so they can better monitor changing weather patterns and major storms.
Investing in housing access, universal health care, and updated infrastructure to make communities healthier and more resilient to extreme weather events.
The overall message is that preventative public-health capacity, surveillance, and social supports will reduce vulnerability for people with chronic illnesses as climate-driven hazards continue.
The article concludes that there are no simple, single fixes to the health threats posed by climate change, and that many of the harms described will persist even if greenhouse gas emissions are halted immediately because the atmosphere and biosphere have already changed. The author emphasizes resiliency — investing in public-health tracking, meteorological monitoring, housing, health care access, and infrastructure — as a practical path to protect people with chronic illness and improve population health in a warming world.