Several regions in France are grappling with severe air pollution caused by fine particles (PM10).

The Bouches-du-Rhône and Vaucluse remain under red alert, while the Var sees slight improvement due to changing weather.

In the Haute-Savoie’s Arve Valley, pollution levels have exceeded daily limits since Friday, worsened by temperature inversions trapping pollutants close to the ground.

Key contributors include inefficient wood heating, road traffic, and industrial emissions.

Authorities have implemented measures like speed reductions, restrictions on wood heating, and temperature limits in buildings.

Residents are advised to limit outdoor activities and vehicle use.

Health experts warn of significant risks, with thousands of deaths annually linked to fine particle pollution in affected regions.