68 departments in the north and east of the country are affected by this maximum alert. 25 departments are classified in yellow for “medium” risk, and only Ariège, Haute-Garonne, and Hautes-Pyrénées are in green.
Air pollution may exacerbate the symptoms of allergy sufferers, the RNSA warns. The spring weather of the coming days will favor the emission and dispersion of pollen from birch, grass, plane tree, oak, ash, willow, poplar.