A map of monitoring stations in the country showed the following cities and towns affected: Budapest, Mosonmagyaróvár, Szombathely, Sarród, Ajka, Veszprém, Székesfehérvár, Százhalombatta, Tököl, Esztergom, Vác, Kecskemét, Salgótarján, Eger, Szolnok and Debrecen.

Children, elderly people and those suffering from chronic respiratory diseases could airway irritation, difficulty breathing or coughing, the statement said.

Staying indoors is recommended, and those that go outside should apply protection against UV radiation.

The concentration of ozone is not expected to change in the next few days, the chief medical officer said.