Heatwave Triggers Dangerous Ozone Levels.

A heatwave in central Switzerland has pushed ozone concentrations to dangerous levels, raising serious health concerns for residents. Authorities have issued warnings urging people to limit outdoor activities, especially during the afternoon when pollution levels peak.

According to Umwelt Zentralschweiz, current measurements show that the hourly ozone limit of 120 micrograms per cubic metre has been widely exceeded in several areas. The problem is most severe during the afternoon hours, when strong sunlight accelerates the formation of ozone in the atmosphere.

Experts explain that intense solar radiation triggers chemical reactions between air pollutants such as vehicle emissions, paints, and industrial solvents, converting them into ground-level ozone. This secondary pollutant becomes particularly concentrated during hot and sunny weather conditions.

Health officials warn that high ozone levels can cause eye irritation, coughing, throat discomfort, and breathing difficulties. Individuals with pre-existing respiratory conditions such as asthma are especially at risk and are advised to take extra precautions.

Authorities recommend that outdoor physical activity should be avoided between midday and evening when ozone concentrations are highest. Ventilation of indoor spaces is also advised during the early morning hours, when air quality is relatively better.

The cantonal environmental agency continues to monitor the situation closely as the heatwave persists, emphasizing the importance of reducing exposure and minimizing health risks during periods of elevated air pollution.