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What defines a heat wave?

Jeff Wagner learned there are several ways to answer the hot topic.

May 14, 2025 (02:42)

NEXT Weather | 6 p.m. weather report for Oct. 15, 2026

NEXT Weather | 6 p.m. weather report for Oct. 15, 2026

Summit Brewing Company announces a new lender has taken over its loans

Summit Brewing Company announces a new lender has taken over its loans

Minnesota man dies after routine dental cleaning in Hopkins, police investigating

Minnesota man dies after routine dental cleaning in Hopkins, police investigating

Man sentenced to life in prison for 2025 "rejection killing" of Richfield woman

Man sentenced to life in prison for 2025 "rejection killing" of Richfield woman

NEXT Weather: 5 p.m. report on Oct. 15, 2026

NEXT Weather: 5 p.m. report on Oct. 15, 2026

Minnesota bishop keeps faith through lung cancer diagnosis

Minnesota bishop keeps faith through lung cancer diagnosis

Small Minnesota school mourns deaths of 3 current, former students

Small Minnesota school mourns deaths of 3 current, former students

13-year-old boy, his mother among 6 killed in Wisconsin plane crash

13-year-old boy, his mother among 6 killed in Wisconsin plane crash

New doc follows two teenage brothers from Chicago who filmed Operation Metro Surge in Minneapolis

New doc follows two teenage brothers from Chicago who filmed Operation Metro Surge in Minneapolis

Former U.S. attorney says ISIS is still recruiting in Minnesota after alleged Mall of America plot

Former U.S. attorney says ISIS is still recruiting in Minnesota after alleged Mall of America plot

Benedictine monk’s art, plus a Picasso, will be auctioned at gala to benefit Saint John’s Abbey

Benedictine monk’s art, plus a Picasso, will be auctioned at gala to benefit Saint John’s Abbey

Freeze watch covers much of Minnesota for Friday night into Saturday morning | Oct. 15, 2026

Freeze watch covers much of Minnesota for Friday night into Saturday morning | Oct. 15, 2026

A record-setting 25 million adults under 35 live with parents, or about 1 in 3

A record-setting 25 million adults under 35 live with parents, or about 1 in 3

WCCO digital headlines: Afternoon of Oct. 15, 2026

WCCO digital headlines: Afternoon of Oct. 15, 2026

Minneapolis mayor's veto holds in driverless rideshare fight

Minneapolis mayor's veto holds in driverless rideshare fight

NEXT Weather: Noon report for Minnesota on Oct. 15, 2026

NEXT Weather: Noon report for Minnesota on Oct. 15, 2026

Minnesota company focuses on creating opportunity for farmers in Philippines

Minnesota company focuses on creating opportunity for farmers in Philippines

WCCO’s Shayla Reaves, husband Leonard Searcy compete as American Heart Association Leaders of Impa

WCCO’s Shayla Reaves, husband Leonard Searcy compete as American Heart Association Leaders of Impa

“Life is still here”: A coach on grieving a pregnancy loss without putting life on hold

“Life is still here”: A coach on grieving a pregnancy loss without putting life on hold

Dial phones, a hurling ball and a pheasant: What turned up at Bachman’s antiques show

Dial phones, a hurling ball and a pheasant: What turned up at Bachman’s antiques show

Rain moves through Minnesota Thursday, with up to a half inch in the southeast | Oct. 15, 2026

Rain moves through Minnesota Thursday, with up to a half inch in the southeast | Oct. 15, 2026

Education Secretary Linda McMahon visits Minnesota, and more headlines

Education Secretary Linda McMahon visits Minnesota, and more headlines

For 3rd time, Minneapolis man accused in neighbor shooting found unfit for trial

For 3rd time, Minneapolis man accused in neighbor shooting found unfit for trial

Series of child deaths in Red Lake Nation program leads to federal takeover

Series of child deaths in Red Lake Nation program leads to federal takeover

New paramedic chopper base opens at Duluth Int'l Airport

New paramedic chopper base opens at Duluth Int'l Airport

4 Your Weekend: Oct. 16-18, 2026

4 Your Weekend: Oct. 16-18, 2026

Wisconsin community mourns pilot killed in small plane crash

Wisconsin community mourns pilot killed in small plane crash

NEXT Weather: 6 a.m. report for Minnesota on Oct. 15, 2026

NEXT Weather: 6 a.m. report for Minnesota on Oct. 15, 2026

High School Sports Rally: Monticello holds off Elk River

High School Sports Rally: Monticello holds off Elk River

This Minnesota high school football coach has led the same team since 1970

This Minnesota high school football coach has led the same team since 1970

NEXT Weather: 10 p.m. report for Minnesota on Oct. 14, 2026

NEXT Weather: 10 p.m. report for Minnesota on Oct. 14, 2026

What the FBI is crediting for a drop in violent crime in Minnesota

What the FBI is crediting for a drop in violent crime in Minnesota

Event brings dance floors to unexpected spaces across Minneapolis

Event brings dance floors to unexpected spaces across Minneapolis

NEXT Weather: 6 p.m. report for Minnesota on Oct. 14, 2026

NEXT Weather: 6 p.m. report for Minnesota on Oct. 14, 2026

Florists hand out free flowers at Mall of America

Florists hand out free flowers at Mall of America

What makes this new Minnesota community so unique

What makes this new Minnesota community so unique

Federal government takes over Red Lake Nation child welfare program

Federal government takes over Red Lake Nation child welfare program

Changes coming to Eden Prairie football games after shooting

Changes coming to Eden Prairie football games after shooting

St. Paul City Council approves study to examine impact of driverless vehicles

St. Paul City Council approves study to examine impact of driverless vehicles

Despite high prices for travel, there’s still plenty of demand

Despite high prices for travel, there’s still plenty of demand

Feds seize Rep. Ilhan Omar’s phone, serve subpoenas to her family

Feds seize Rep. Ilhan Omar’s phone, serve subpoenas to her family

Birch’s on the Lake hosts Oysterfest with a shucking competition and a new Irish stout

Birch’s on the Lake hosts Oysterfest with a shucking competition and a new Irish stout

“There will never be less than two pilots in a Delta cockpit,” CEO Ed Bastian says

“There will never be less than two pilots in a Delta cockpit,” CEO Ed Bastian says

Don’t wait for January: “October theory” encourages starting your fitness goals now

Don’t wait for January: “October theory” encourages starting your fitness goals now

This weekend and next could be peak fall color in the Twin Cities | Oct. 14, 2026

This weekend and next could be peak fall color in the Twin Cities | Oct. 14, 2026

Inflation jumps to 3.7% in September as gas prices surge more than 34% in a year

Inflation jumps to 3.7% in September as gas prices surge more than 34% in a year

WCCO digital headlines: Afternoon of Oct. 14, 2026

WCCO digital headlines: Afternoon of Oct. 14, 2026

NEXT Weather: Noon report for Minnesota on Oct. 14, 2026

NEXT Weather: Noon report for Minnesota on Oct. 14, 2026

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