INDIANAPOLIS — Emergency crews rescued residents from flooded homes Saturday after storms dumped as much as 10 inches of rain on already soggy central Indiana.

The National Weather Service issued flash flood warnings for 15 counties and said record flooding was possible.

Flooding in Johnson County closed roads and at least two rural bridges had failed, said county dispatcher Zachary Elliott. He said a state of emergency had been declared.

Emergencies also were declared in at least two other counties.

The Coast Guard sent rescue teams to landlocked Morgan County southwest of Indianapolis, and the National Guard sent helicopters to assist in rescues.

More than 30,000 electric utility customers were blacked out, the Indiana Utilities Regulatory Commission said.

Authorities opened emergency shelters in Johnson County, the Bloomington area and in Indianapolis.

Interstate 70 was closed to at least passenger traffic in Clay County in west central Indiana, the Indiana Department of Homeland Security said.

The same storm system caused flooding and wind damage late Friday in northwest Ohio and parts of Michigan.

Weather service officials were examining damage patterns in several eastern Indiana counties and Ohio's Van Wert County, where trained weather spotters reported several funnel clouds and tornado touchdowns Friday evening, meteorologist Mark Steinwedel said.

About 15,000 Ohio households were still without power Saturday morning, including 10,000 in the Defiance area, said FirstEnergy spokeswoman Ellen Raines. Several hundred American Electric Power customers were also without power on Saturday, according to its Web site.

In Michigan, Consumers Energy said about 45,000 of its more than 104,000 customers that lost power Friday still didn't have electrical service Saturday. "Utility, line clearing and contract crews will continue to restore power throughout the day," a company statement said.

Detroit Edison said about 22,000 customers were without power Saturday in Michigan out of the roughly 50,000 blacked out late Friday.