At the height of the storm Sunday night, KCP&L reports about 77,000 people lost power.
Westar Energy had fewer than 750 outages listed on their online outage map by midday Monday, most of them in central Kansas. Only a couple dozen Kansas City, Kan., BPU customers remained without electricity early Monday.
More than 300 linemen were out working to restore power to KCP&L customers, utility spokesman Chuck Caisley said.
"It was a long line (of storms) stretching several hundred miles south to north throughout our service territory, so the damage has been widespread," Caisley said.
He said most customers without power should be restored by the end of the day.
"If you have trees or something that is particular to your house or business that could be obstructing power service, that could make it a little longer."
Ned Vail has that sort of problem His 90-year-old oak tree fell onto his home, near 68th and Wornall, Sunday night.
"All of a sudden it was just a big bang," Vail said. "At first we thought it was our neighbor's tree, then we realized it was our old oak."
The storm also knocked over a tree near S. Benton and 38th Street, also in Kansas City. That tree knocked out a power line, cutting electricity to the neighborhood for about an hour.
Cliff Slaughter lives in the area and heard it all happen.
"First i heard some loud cracking noise and next thing I know, I heard a boom," Slaughter said. "I was hoping nobody's car was up under there."
In Independence, Mo., damage could be seen early Monday on the roof of Full Gospel Assembly at 10537 E. 6th St.
Sunday night, crews headed to 99th and Antioch Sunday night in Overland Park, Kan., on reports of trees down. Prairie Village, Kan., officials had a report of a massive tree blocking Roe at 91st Street.
In Kansas City, Mo., trees were down on Warwick Boulevard at 43rd Street and again just a few blocks away on Warwick near Oak Street.
Several area agencies also responded to calls of lightning-related fires.
The doors blew in at the Liberty Hospital emergency room during the storm. The hospital reported that people in the ER waiting area had to move to a different location in the hospital.