As spring arrives in the US, millions of Americans are battling seasonal allergies. But this year’s symptoms feel worse than ever. According to scientists, rising temperatures are largely to blame for a worsening allergy season.
Warmer temperatures and environmental shifts have made allergens like tree pollen, ragweed, and mold more abundant and intense. Forecasters predict the pollen season will last longer in some areas, with allergens reproducing at higher rates. This has led to an increase in severe allergy attacks, even among those with allergic asthma.
The main culprit behind this trend is increased carbon dioxide in the atmosphere, which causes plants to bloom earlier and release more pollen. Warmer temperatures also alter the chemical composition of pollen, making it more allergenic. Additionally, air pollution exacerbates these effects.
A recent EPA study found that up to 60,000 asthma-related emergency department visits are linked to pollen each year. This number is projected to rise by 2090. To combat worsening allergies, experts recommend checking local pollen levels regularly, improving indoor air quality with air purifiers, and following doctor’s advice on medications.
Source: https://weather.com/health/allergy/news/2025-04-04-climate-worsening-spring-allergies