CNN —
At least 15 people, including four children, are dead after suspected tornadoes struck the central United States overnight, as severe storms caused power outages and forced residents to shelter in-place on Memorial Day weekend.
Meanwhile, just under 109 million people across broad swaths of the US are under threat of large hail, damaging winds and a fierce twisters Sunday, mainly throughout the mid-Mississippi, Ohio and Tennessee River valleys. As the storms move east, the Storm Prediction Center warned of “violent tornadoes, extreme hail and corridors of widespread wind damage.”
The 108th running of the Indianapolis 500 began on Sunday afternoon about four hours later than expected due to extreme weather delays that interrupted pre-race festivities.
President Joe Biden has been briefed on the storms.
At least seven people in Cook County, Texas, were killed when severe storms hit the area Saturday night, Sheriff Ray Sappington told CNN. Among the dead were four juveniles, including a 2-year-old and 5-year-old.
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The severe weather that swept through Arkansas has now killed at least five people.
“At least two storm-related fatalities in Marion County from the severe weather that tracked through the county in the early morning hours on Sunday,” Marion County Sheriff Gregg Alexander said in a Sunday news release.
Arkansas Department of Public Safety spokeswoman Cindy Murphy told CNN a storm-related death occurred in Boone County.
The Baxter County Sheriff’s Office said in a news release there was one death there from the early morning storms and another person was killed in Benton County, the county’s safety administrator told CNN.
Eleven northern Arkansas counties were affected by the storms, according to Murphy.
Gov. Sarah Huckabee Sanders declared a state of emergency Sunday afternoon to support the severe weather and tornado-ravaged parts of the state.
“We remain in close contact with local officials and will continue to do everything possible to help each Arkansan in need,” the governor said in a message on X.
One person died in Kentucky, according to a social media post by Louisville Mayor Craig Greenberg.
In northeast Oklahoma, two people were killed and at least 23 were injured as a result of severe storms overnight, local officials told CNN.
After severe storms tore through northeast Oklahoma Saturday night, 23 people were injured, electrical substations were downed and the city of Claremore was left with no operating gas systems, Claremore City Manager John Feary said.
Among the injured, 19 were transported to hospitals, three with potentially critical or life-threatening injuries, Feary said.
Survey teams from the National Weather Service found severe damage Sunday in Claremore, giving the tornado a preliminary rating of EF3.
EF3 tornadoes pack winds of 136 to 165 mph. The damage was found north of Highway 20, east of Claremore.
Inside a Shell gas station in northeast Texas, 60 to 80 people were trapped until the storm blew over, Sappington said. Multiple injuries were reported at the station, but none were life-threatening, he added.
Many vehicles were damaged and destroyed, leaving about 40 people stranded. They were transported by bus to another gas station in Gainesville, where they were picked up by family members.
City of Denton (Texas) Fire Department shares photo of damaged building following severe weather reported in area.
In north Denton County, a possible tornado injured an unknown number of people, damaged several homes, overturned 18-wheelers, downed trees and knocked out power lines on Saturday night, authorities said early Sunday. Deputies responded to multiple locations, including “homes and RV trailer parks,” Dawn Cobb, a county spokesperson, said in a news release.
“Multiple victims” were reported in Ray Roberts after severe weather struck the area overnight, city of Denton fire officialssaid, adding medics and other resources have been sent to the scene.
Damage to several homes was also reported in the neighboring city of Celina, where officials said the city was affected by “apparenttornadic activity” on Saturday.
The National Weather Service office in Fort Worth issued several tornado warnings for multiple North Texas cities late Saturday night, telling residents to seek shelter immediately as a tornado was seen heading east between Valley View and Sanger around 10:40 p.m.
Lake Ray Roberts Marinain the city of Sanger in Denton County sustained damage to boats, boat houses and the fuel dock by the severe weather Saturday night. Despite reports of people rescued after being trapped in overturned RVs, there are no reports of serious injuries.
“There is so much damage, we don’t even know where to start,” the marina said in aFacebook postSunday morning.
“We know the boat houses are heavily damaged, all have lost walkways, and most boats are damaged,” the post said. “We lost our fuel dock and offices along with our dock cat, Ginger.”
In Bentonville, Arkansas, crews are working to respond to power outages and emergency medical calls, according to Mayor Stephanie Orman.
“We have crews mobilized throughout the city. We have power lines, down– about 10,000 probably out with power. We’ve got trees across roads, we’re really encouraging individuals to stay off the roads as we tried to clean up those road systems. We also have signals down,” Orman said. “We have had over 20 EMS calls and so those are currently being worked.”
Across state lines, damage was also reported throughout Rogers County, Oklahoma, after a possible tornado swept the area, downing power lines and trees and damaging homes.
Severe storms tore through buildings and parking lots in Benton County, Arkansas, on May 26.
As damaged areas recover, storms move east
More than 480,000 customers across seven states were without power by Sunday afternoon, including more than 200,000 outages in Kentucky alone, according to the tracking websitepoweroutage.us.
A new tornado watch impacting 1.5 million people was issued Sunday for parts of Arkansas, Kansas, Missouri and Oklahoma until 9 p.m. CT that includes Springfield, Branson, and Joplin in Missouri, as well as Fayetteville, Arkansas.
Supercell thunderstorms could produce a couple tornadoes, scattered large hail up to the size of tennis balls and damaging wind gusts to 70 mph, according to the Storm Prediction Center.
There is a Level 3 of 5 risk of severe thunderstorms over parts of the Mississippi and Ohio valleys into Monday morning, and EF2 to EF5 tornadoes and wind gusts of 74 mph are possible, according to the Storm Prediction Center. A Level 4 of 5 risk of severe thunderstorms also exists in parts of the Central and Southern Plains through Sunday morning.
A forecast model depicts one way storms could develop over Memorial Day weekend.
Storms will movetoward the East Coast Monday, bringing disruptive high winds and large hail from DC through the southeas.
The travel hubs of Chicago, Indianapolis, St. Louis and Nashville could have to contend with damaging storms, leading to delayed or canceled flights.
The potential for heavy rain over parts of the Ohio and Tennessee Valleys, middle Mississippi Valley, and Central Appalachians prompted the slight risk, Level 2 of 4, of excessive rainfall in those regions through Monday morning.
Cities like Louisville, Kentucky; Cincinnati; St. Louis; Nashville, Tennessee; and Indianapolis are among the cities included in the Level 3 threat.
Record-breaking heat possible for some
The unofficial start of summer is also ushering in sweltering heat, reaching potentially record high temperatures for parts of the US on Monday.
Houston; New Orleans; Miami; Mobile, Alabama, Tampa, Florida; and Charleston, South Carolina, are among locations where warm weather will feel more like July than late May through the holiday weekend.
A subtropical upper-level high over Mexico will help spawn excessive heat warnings and heat advisories over southern Texas through Monday, according to the Storm Prediction Center. “The ridging will create a dangerous early-season heat wave over south Texas and southern Florida,” according to the center.
Daily high temperatures and heat index reading exceeding 115 are possible in some areas, the Storm Prediction Center noted.
Those spending time outdoors or who are dealing with a loss of power should drink enough water, dress in lightweight clothing and locate cooling centers if necessary.
CNN meteorologists Elisa Raffa and Elliana Herbert and CNN’s Ed Lavandera, Jillian Sykes, Joe Sutton and Chris Boyette contributed to this report.
