Smog alerts brought to end in Prague and Ústí region

Meteorologists have ended smog alerts that they announced at the start of the weekend in Prague and the Ústí nad Labem Region. The smog was caused by a high concentration of tropospheric ozone linked to the current very hot weather. Those with chronic breathing problems, the elderly and small children were advised to avoid strenuous activities outdoors during the hottest parts of the day.