With a temperature of 101 recorded at the Billings Logan International Airport Saturday afternoon, Billings set a new record for a daily high temperature on August 11.
But 101 degrees might not be where the thermometer stops, according to the National Weather Service in Billings.
At the weather service's West End location, the temperature reached 103 by the time the airport, sitting at an elevation about 400 feet higher, hit 101 at around 4 p.m. A strong upper level high pressure ridge sitting over the city has combined with smoke to trap heat and send temperatures soaring.
"It's not out of the question it could go up a little bit more," said Larry Dooley, observation program leader with NWS Billings.
The previous record high of 100 was set in 1996.
Temperatures are expected to drop down Monday in Billings, with a high of 82 forecast.
But Saturday, the heat is expected to stick around.
"It's gonna be a slow drop until the sun goes down," Dooley said.
Despite the recent heat in Billings, other areas have had it worse. On Friday at 4 p.m. Glasgow broke a record high of 103 degrees set in 1935 after the temperature reached 107 at the Glasgow airport.
Portions of south-central Montana, south eastern Montana and north-central Wyoming were placed under an excessive heat warning Saturday until midnight by the National Weather Service in Billings.
Counties for which the warning applies include Yellowstone, Musselshell, Treasure, Custer, Fallon, Powder River and Carter.
Portions of other counties affected include southern and northern Big Horn County, eastern Carbon County, northern and southern Rosebud County and the Sheridan foothills.
Towns and cities included in the excessive heat warning include: Billings, Roundup, Hysham, Pryor, Lodge Grass, Bridger, Joliet, Hardin, Crow Agency, Colstrip, Forsyth, Miles City, Baker, Broadus, Ekalaka, Lame Deer and Sheridan.
"Excessive heat will result in an increased potential for heat related illnesses," the warning says. "Those working or participating in outdoor activities during the afternoon and early evening hours or those without relief from air conditioning will be the most at risk."
An excessive heat warning issued by the National Weather Service in Glasgow was also issued Saturday for several counties due to the potential for temperatures from 100 to 108 degrees. That warning is scheduled to remain until 9 p.m.
The warning includes Sheridan, McCone, Richland, Dawson, Prairie, Wibaux Daniels, Petroleum and Garfield County.
Portions of counties affected include western Roosevelt, eastern Roosevelt, central, southeastern and southwestern Phillips and southern and northern Valley.
Towns and cities under that excessive heat warning include Plentywood, Medicine Lake, Wolf Point, Poplar, Circle, Sidney, Fairview, Glendive, Richey, Terry, Wibaux, Culbertson, Malta, Saco, Glasgow, Fort Peck, Hinsdale, Frazer, Scobey, Winnett, Jordan, Whitewater, Zortman and Opheim.