Allergy Season Intensifies as Climate Change Extends Pollen Periods

Experts offer tips to manage symptoms and seek professional help as allergy seasons worsen.

Mar. 22, 2026 at 7:05pm

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Allergy seasons are arriving earlier, lasting longer, and becoming more intense due to climate change, impacting the lives of millions of Americans. The Asthma and Allergy Foundation of America ranks certain cities as particularly challenging for allergy sufferers, highlighting the need for localized awareness. Understanding the key pollen types and timing, as well as monitoring daily pollen levels, are crucial for managing symptoms. Avoidance strategies, proper use of over-the-counter treatments, and seeking professional guidance from allergists can provide relief.

Why it matters

Seasonal allergies not only disrupt quality of life, but also strain healthcare resources. As climate change continues to exacerbate allergy seasons, it's important for individuals to stay informed and take proactive steps to minimize exposure and manage their symptoms.

The details

Pollen, the reproductive powder of plants, is the primary trigger for seasonal allergies. Tree pollen typically dominates in early spring, followed by grasses, and then weeds in late summer and early fall. Common allergy-inducing trees include birch, cedar, cottonwood, maple, elm, oak, and walnut, while grasses like Bermuda, Johnson, rye, and Kentucky bluegrass are also frequent offenders. Monitoring pollen levels through resources like the American Academy of Allergy Asthma and Immunology (AAAAI) can help individuals proactively adjust their activities and minimize exposure. Avoidance strategies, such as keeping windows closed, wearing long sleeves, and showering after being outdoors, can significantly reduce pollen infiltration. Over-the-counter nasal sprays and oral allergy medications can provide relief, though proper technique is essential. Consulting an allergist is recommended if symptoms significantly impact daily life, as they can offer treatments to train the immune system to reduce overreactions to allergens.

  • Climate change has lengthened the freeze-free growing season in 87% of U.S. cities, averaging 21 additional days since 1970.
  • Between 1995 and 2011, warmer temperatures in the U.S. lengthened the pollen season by 11 to 27 days.

The players

Asthma and Allergy Foundation of America (AAFA)

An organization that annually ranks cities based on allergy challenges, considering factors like over-the-counter medication employ, pollen counts, and access to specialists.

American Academy of Allergy Asthma and Immunology (AAAAI)

An organization that provides pollen counts through a network of stations across the U.S., accessible via their website and email updates.

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The takeaway

As allergy seasons continue to evolve, staying informed, proactive, and seeking professional guidance will be crucial for managing symptoms and enjoying a better quality of life.