Police reportedly had to block off roads up to the hills because so many people refused to heed warnings, and some had to be rescued by fire crews.
Security forces blocked off roads throughout Baghdad, and the wounded were rushed to nearby hospitals.
The police responded by blocking off roads to the Parliament building.
The streets are eerily deserted, rebel fighters blocking off roads around the station.
Atlanta Police spokesman Ronald Campbell said authorities had blocked off roads around the CNN Center, where heavy debris filled the streets.
The police blocked off roads a half-mile in every direction and at one point, even an American military convoy had trouble getting through.
The militia was reported to have taken over some municipal buildings in Sadr City, in northeastern Baghdad, and to have blocked off roads parts of the district.
Officials warned of an imminent humanitarian emergency in areas most severely hit by the bad weather, with snow sweeping through villages and blocking off roads.
After the fire security forces and three trucks of riot police blocked off roads around the two-storey compound in eastern Yangon which encompasses a mosque, a Muslim school and a dormitory.
Soldiers have taken over TV and radio stations, and blocked off roads in the capital, Bangkok.
