Severe thunderstorms swept across the Plains and Midwest during the weekend, spinning off tornadoes, causing power outages and delaying travel for airline passengers.

Two people were killed in weekend storm-related accidents in Missouri.

About 2,000 travelers had to spend the night camped in a terminal at Houston's Bush Intercontinental Airport (search) because their flights scheduled on Sunday were canceled by heavy rain.

All flights were expected to be back on schedule Monday afternoon, airport spokesman Ernie DeSoto said. He said did not know how many flights were canceled.

The estimated 3.86 inches of rain in Houston on Sunday also stalled highway traffic and halted MetroRail service, and more than 13,000 customers lost electricity.

Thousands of sandbags were being filled Monday at Berlin, Wis., where the Fox River (search) rose to a record 15.9 feet after prolonged rainfall over the past several weeks, including some rain during the weekend.

"A lot of houses have water all around them," said Gary Podoll, emergency management director for Green Lake County and the town of Berlin.

Lightning struck the ground outside a tent at the Army's Fort McCoy (search) in west-central Wisconsin on Sunday, injuring 17 Army Reservists from the San Antonio, Texas, area, said public affairs officer Linda Fournier. One soldier remained hospitalized Monday.

A flood watch was in effect Monday in northern Indiana, where some low-lying neighborhoods were flooded in the Fort Wayne area. The Maumee River was forecast to crest Monday at 21.4 feet, about 4 feet above flood stage.

The Wabash River was receding at West Lafayette, Ind., where some streets were flooded by 4 feet of water Saturday after the area received more than 7 inches of rain in 48 hours.

In Michigan, severe thunderstorms spawned funnel clouds Sunday but no injuries were reported. Hail up to 3 inches in diameter fell in an area about 20 miles northeast of Grand Rapids, officials said.

On Saturday, severe storms struck western Missouri and eastern Kansas with wind gusting to 75 mph and several tornadoes, and about 110,000 homes and businesses were blacked out. Utilities hoped to have all service restored by Monday evening.

One man drowned when waves swamped his boat on Truman Lake, about 70 miles southeast of Kansas City, Mo. A 4-year-old girl was killed in a multiple-car wreck Saturday in poor visibility, the Missouri State Highway Patrol said.