(CNN) -- Iran has declared a two-day public holiday in Tehran after air pollution hit dangerous levels.
All schools, public offices, universities and banks in the Iranian capital will be closed Wednesday and Thursday, the Islamic Republic New Agency reported.
Tehran's downtown skyline was barely visible Tuesday.
Residents have been asked to avoid outdoor activities and encouraged to use public transportation.
Health warnings have been issued informing people suffering from lung and heart conditions to stay at home, as well as the elderly and children, according to Iran's Ministry of Health's website. CNN
