Published: May 11, 2010 5:51 PM EDT

NORMAN, Okla. (AP) - An Oklahoma City fire official says there could be more victims from yesterday's violent storms, but the weather is hampering the search.

He says heavy fog was making it hard for rescuers to see downed power lines and other hazards early today, so they were waiting for sunshine before resuming the search of wrecked homes.

Four Oklahoma City neighborhoods are closed off because of gas leaks, downed power lines and debris. Authorities say residents can help by staying off the roads.

The storms that tore through the southern Plains left at least five people dead and dozens injured. The National Weather Service estimates that 10 tornadoes touched down in Oklahoma.

The weather is expected to calm down today. The storms also did some damage in Kansas, but no injuries were reported.