Alsace is experiencing an unusually early and potent allergy season, with residents reporting symptoms as early as January. Pollen counts are surging, impacting individuals sensitive to hazel and alder trees, and experts predict the situation will worsen with the arrival of birch pollen weeks ahead of schedule. This early start and increased intensity are raising concerns about public health and the growing impact of climate change on seasonal allergies.
The surge in pollen levels isn’t just an inconvenience; it’s a sign of a broader trend. Rising temperatures and changing weather patterns are extending pollen seasons, increasing the amount of pollen released, and exacerbating symptoms for allergy sufferers. Nearly one in three adults in France now suffer from pollen allergies, a significant increase from around 20% three decades ago, and projections suggest that nearly half the population could be affected by 2050. Understanding the factors driving this increase and how to mitigate its effects is becoming increasingly crucial.
On Monday, March 9th, 2026, Atmo Grand Est, the air quality monitoring organization for the region, measured high concentrations of alder pollen. This follows a peak in hazel pollen concentration observed on February 10th. Adding to the concern, the first birch pollen – known to be a particularly potent allergen – has already appeared, nearly three weeks earlier than last year, due to anticyclonic conditions and unseasonably mild temperatures. This early arrival signals a potentially prolonged and severe allergy season.
Pollen Levels on the Rise
Data from Atmo Grand Est confirms a long-term trend of increasing pollen concentrations. An analysis of 26 years of measurements (1998-2023) in the Strasbourg metropolitan area shows a 55% increase in birch pollen levels. The first peak in birch pollen now occurs approximately 10 days earlier, and the overall season has lengthened by about 6 days. This shift is directly linked to climate change, according to experts.
“Pollen is becoming more prevalent earlier with climate change. But more importantly, pollen seasons are lengthening: they start earlier, end later, and the amounts emitted are greater,” explains Christophe Marcot, a pulmonologist and allergist at the University Hospitals of Strasbourg (HUS). This extended exposure significantly increases the burden on allergy sufferers.
The Impact of Air Pollution
The situation is further complicated by air pollution. Marcot notes a “harmful combination with fine particles,” currently present in Alsace. “Pollen and pollution combine to form a sort of ‘super particle.’ It penetrates deeper into the respiratory tract and causes more significant reactions.” This synergistic effect amplifies the severity of allergic responses, making symptoms more intense and potentially leading to more serious respiratory issues.
The combination of climate change, air pollution, and lifestyle factors – including the consumption of ultra-processed foods, endocrine disruptors, and alterations in the gut microbiome – are weakening our natural defenses, making us more susceptible to allergies. “Our pulmonary, digestive, and cutaneous barriers are being compromised. The effects are cumulative,” Marcot explains.
Managing Allergy Symptoms
Marcot outlines a three-tiered approach to managing allergies. The first level, “common sense medicine,” focuses on limiting exposure: avoiding outdoor sports during peak pollen and pollution levels, ventilating homes early in the morning or late in the evening during birch pollen season, and changing clothes and washing hair upon returning home. The second level involves symptomatic treatments, primarily antihistamines in the form of tablets, drops, or nasal sprays. Finally, for more severe cases, desensitization – a long-term treatment lasting 3 to 5 years – can be considered to gradually acclimate the body to the allergen.
The allergy season is far from over. Following the early bloom of hazel, alder, and birch trees, grass pollen will soon be released, typically causing the most intense allergies between May and July.
As pollen seasons continue to shift and intensify, proactive management and awareness are crucial for protecting public health. Staying informed about pollen forecasts, taking preventative measures, and seeking appropriate medical care can help individuals navigate this growing challenge.
What are your experiences with this year’s allergy season? Share your thoughts and tips in the comments below.
Disclaimer: This article provides informational content and should not be considered medical advice. Please consult with a qualified healthcare professional for diagnosis and treatment of allergies or any other medical condition.
