Spring has arrived two weeks earlier than usual in several Midwest states, and for allergy sufferers, it’s a bad omen. The USA National Phenology Network at the University of Arizona reports that warm temperatures are expected to exacerbate pollen levels, particularly in southern and eastern regions.
According to climate predictions, these areas will experience far above-average temperatures, leading to an increase in pollen counts due to blossoming trees. This is especially concerning for those with seasonal allergies, who account for about 1 in 4 adults and 1 in 5 children in the US.
Some cities have seen significant jumps in their allergy rankings. For example, California’s eight major cities saw a large increase in allergen levels, while New Orleans jumped from 34th place to second in 2025.
So, why does pollen cause allergies? When plants release pollen, it drifts into the air and can be easily inhaled. In some people, inhaling pollen triggers an overreaction of the immune system, leading to symptoms like runny noses, itchy eyes, and histamine releases.
To alleviate allergy symptoms, reducing exposure to pollen allergens and identifying seasonal triggers are key. By taking these steps, individuals can help minimize their reaction to the worsening allergy season.
Source: https://eu.usatoday.com/story/graphics/2025/03/22/allergy-season-spring-pollen-symptoms/82568198007