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  1. Friday
    A forecast map for Friday
  2. Saturday
    A forecast map for Saturday
  3. Sunday
    A forecast map for Sunday
  4. Monday
    A forecast map for Monday
  5. Tuesday
    A forecast map for Tuesday
  6. Wednesday
    A forecast map for Wednesday
  7. Thursday
    A forecast map for Thursday

Tracking Dangerous Heat in the U.S.

By Matthew Bloch, Lazaro Gamio, Zach Levitt, Eleanor Lutz, Bea Malsky and John-Michael Murphy

Dangerous levels of heat are forecast in the South and West on Friday, according to data from the National Oceanic and Atmospheric Administration.

See temperatures on this page as:

Heat index forecast for Friday

Heat index measures how hot it feels outside, accounting for temperature and humidity. Map shows highest level forecast for the day.

Caution Feels like 80°-90°
Extreme caution 90°-103°
Danger 103°-125°
A map showing the highest forecast heat index level in the contiguous United States on Friday.

Source: NOAA  •  Note: Forecast data is as of 8:15 a.m. Eastern on August 9, 2024. Map shows the highest forecast heat index level on Friday.

Jump to:
Your areaMajor citiesThe week ahead

About 58 million people — 17 percent of the population of the contiguous United States — live in the areas expected to have dangerous levels of heat.

The heat index is a measure of how hot it really feels outside, taking into account humidity along with temperature. The measurement is used to indicate when the level of heat is dangerous for the human body while in the shade. When out in the sun, a person could perceive that temperature as being higher by up to 15 degrees Fahrenheit (8.3 degrees Celsius).

Risks associated with heat index levels

Caution

Fatigue is possible after long exposure or exercise.

A heat index of 80 to 90 degrees Fahrenheit

Extreme caution

Possible risk of heat stroke, heat cramps or heat exhaustion after long exposure or exercise.

90 to 103 degrees

Danger

Heat cramps or heat exhaustion is likely. After long exposure or exercise, heat stroke is also possible.

103 to 125 degrees

Extreme danger

Heat stroke is highly likely.

125 degrees or higher

Risk level definitions are from NOAA.

Hundreds of people die from extreme heat in the United States every year. On hot days, the National Weather Service recommends that people drink fluids, stay in cooler rooms, keep out of the sun and check up on relatives and neighbors, especially older people and those who live alone.

How hot will it feel in your area?

Look up the coming week’s forecast for places across the country, and see the heat index forecast in or near your city or town.

Heat index forecast for…

Heat forecasts in major cities

During this weeklong period, 54 major cities are forecast, as of Friday, to have dangerous levels of heat on one or more days.

City
Fri.
Sat.
Sun.
Mon.
Tue.
Wed.
Thu.
Corpus Christi, Texas
112
112
112
108
108
108
108
Tallahassee, Fla.
112
105
106
105
106
106
105
Key West, Fla.
111
111
108
108
108
109
108
Houston, Texas
110
106
108
107
107
107
107
Macon, Ga.
110
109
103
100
100
100
96
Phoenix, Ariz.
109
112
109
106
105
105
105
Chandler, Ariz.
109
112
110
106
105
107
106
Gilbert, Ariz.
109
112
110
107
105
106
106
Brownsville, Texas
109
107
106
106
107
109
107
Austin, Texas
108
105
108
105
107
106
107
Mesa, Ariz.
108
112
110
106
104
106
105
Miami, Fla.
108
106
103
101
103
103
105
Glendale, Ariz.
108
112
108
106
104
105
104
Scottsdale, Ariz.
108
112
108
105
104
105
105
Peoria, Ariz.
108
112
109
106
105
105
105
Tempe, Ariz.
108
111
109
106
104
105
105
Savannah, Ga.
108
109
108
106
105
100
97
Jacksonville, Fla.
107
105
107
103
105
103
99
Augusta, Ga.
107
108
100
100
98
93
92
Mobile, Ala.
107
106
102
101
107
110
110
Gulfport, Miss.
107
106
102
105
109
111
109
San Antonio, Texas
106
105
107
104
105
106
106
Orlando, Fla.
106
106
105
106
105
106
105
St. Petersburg, Fla.
106
108
103
105
105
105
105
Laredo, Texas
106
109
107
105
107
106
105
Columbus, Ga.
106
106
99
98
102
102
104
Fort Lauderdale, Fla.
106
106
103
102
105
103
103
Biloxi, Miss.
106
105
101
106
109
109
109
Las Vegas, Nev.
105
106
104
101
98
97
97
Tucson, Ariz.
105
107
105
100
98
101
100
Tampa, Fla.
105
105
102
103
103
103
102
New Orleans, La.
105
105
104
105
107
107
109
Hialeah, Fla.
105
106
103
102
105
105
105
Killeen, Texas
105
105
106
102
105
104
104
Charleston, S.C.
105
108
105
103
100
95
93
Baton Rouge, La.
104
104
102
106
107
109
109
Athens, Ga.
104
104
98
97
97
91
94
Lafayette, La.
104
105
104
106
110
110
109
Montgomery, Ala.
103
99
98
96
99
101
100
Hattiesburg, Miss.
103
102
98
100
105
107
110
Dallas, Texas
102
103
104
104
105
106
107
Irving, Texas
102
103
104
104
105
106
107
Shreveport, La.
102
95
96
100
104
107
106
Fort Worth, Texas
101
103
107
105
106
108
108
Arlington, Texas
101
102
105
104
105
106
106
Plano, Texas
101
100
102
104
105
108
107
Garland, Texas
101
100
102
104
105
105
106
Frisco, Texas
100
101
103
105
106
108
108
McKinney, Texas
100
101
101
105
104
106
108
Grand Prairie, Texas
100
103
105
105
106
106
108
Jackson, Miss.
97
99
94
97
103
106
106
Little Rock, Ark.
96
86
85
90
97
102
103
Tulsa, Okla.
88
76
88
98
104
110
107
Oklahoma City, Okla.
86
76
98
102
103
104
103

Source: NOAA  •  Note: Forecast data is as of 8:15 a.m. Eastern on August 9, 2024. Values shown represent the highest forecast heat index level for each day.

The week ahead across the nation

While next-day forecasts can be quite accurate, forecasts become less reliable the further into the future they predict. Over the next week, dangerous levels of heat are expected in the South and West.

Heat index forecast for the next six days

Maps show the highest level forecast each day.

Caution Feels like 80°-90°
Extreme caution 90°-103°
Danger 103°-125°
Extreme danger 125°+

Saturday, Aug. 10

A forecast map for Saturday

Sunday, Aug. 11

A forecast map for Sunday

Monday, Aug. 12

A forecast map for Monday

Tuesday, Aug. 13

A forecast map for Tuesday

Wednesday, Aug. 14

A forecast map for Wednesday

Thursday, Aug. 15

A forecast map for Thursday

Source: NOAA  •  Note: Forecast data is as of 8:15 a.m. Eastern on August 9, 2024.

Summer temperatures have become hotter and more extreme in recent decades, and the health effects of extreme heat can be severe.

Maps on this page are as of 8:12 a.m. on Aug. 9, 2024, using data from the National Oceanic and Atmospheric Administration. All data shown are forecasts, including maps for the date of publication.

The highest forecast heat index is calculated using all available hourly forecasts for each day published by the NOAA. For some days further in the future, forecasts are published only every three or six hours. This means that the highest forecast heat index numbers are more accurate for the most recent maps.

Population calculations are based on census tract population centers from the U.S. Census Bureau. Tracts are determined to be at risk of dangerous heat if the population center of the tract is forecast to be exposed to a heat index of 103 degrees Fahrenheit or more.