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 Monday, according to data from the National Oceanic and Atmospheric Administration.
See temperatures on this page as:
Heat index forecast for Monday
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°
Source: NOAA • Note: Forecast data is as of 8:15 a.m. Eastern on August 12, 2024. Map shows the highest forecast heat index level on Monday.
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Your areaMajor citiesThe week ahead
About 57.5 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, 58 major cities are forecast, as of Monday, to have dangerous levels of heat on one or more days.
City
Mon.
Tue.
Wed.
Thu.
Fri.
Sat.
Sun.
Corpus Christi, Texas
111
108
108
108
109
111
106
Houston, Texas
110
107
111
110
109
110
111
Oklahoma City, Okla.
109
106
106
101
100
103
101
Laredo, Texas
109
109
108
106
107
107
106
Brownsville, Texas
109
107
109
109
109
110
107
Chandler, Ariz.
108
108
106
107
108
106
105
Gilbert, Ariz.
108
108
106
107
108
106
106
Key West, Fla.
108
109
109
108
108
106
103
Phoenix, Ariz.
107
106
105
106
107
105
104
Jacksonville, Fla.
107
106
109
95
93
96
98
Mesa, Ariz.
107
106
105
105
107
106
104
Baton Rouge, La.
107
110
110
109
109
109
109
Peoria, Ariz.
107
106
104
105
106
105
104
Tempe, Ariz.
107
105
105
105
107
104
104
Gulfport, Miss.
107
109
109
109
109
108
109
Glendale, Ariz.
106
105
105
105
106
103
104
Scottsdale, Ariz.
106
105
105
105
106
103
104
Hialeah, Fla.
106
106
106
106
102
101
101
Tallahassee, Fla.
106
105
104
102
101
101
102
Fort Lauderdale, Fla.
106
103
105
103
102
98
101
Savannah, Ga.
106
105
95
91
90
94
97
Lafayette, La.
106
111
111
106
107
109
109
San Antonio, Texas
105
107
107
104
104
105
104
Austin, Texas
105
110
108
109
108
109
110
Miami, Fla.
105
105
105
105
101
100
100
Tampa, Fla.
105
105
105
103
100
97
98
New Orleans, La.
105
108
109
109
107
107
109
Orlando, Fla.
105
106
106
103
96
97
100
St. Petersburg, Fla.
105
105
106
105
101
97
99
Mobile, Ala.
105
104
109
109
109
106
106
Shreveport, La.
105
111
110
107
107
109
106
Charleston, S.C.
105
102
93
90
89
93
97
Biloxi, Miss.
105
107
109
106
108
106
110
Dallas, Texas
104
106
108
105
107
107
106
Fort Worth, Texas
104
105
108
108
107
107
106
Arlington, Texas
104
104
108
106
107
106
105
Irving, Texas
104
106
108
105
107
106
105
Killeen, Texas
104
103
105
104
104
104
104
Plano, Texas
103
105
108
106
107
106
104
Garland, Texas
103
104
107
106
106
106
105
Frisco, Texas
103
104
108
106
108
105
104
McKinney, Texas
103
105
108
105
106
106
104
Grand Prairie, Texas
103
104
109
108
107
107
104
Jackson, Miss.
101
105
106
107
107
107
103
Hattiesburg, Miss.
101
104
106
106
105
106
105
Tulsa, Okla.
100
107
110
102
102
104
101
Wichita, Kan.
97
100
104
94
95
97
93
Tupelo, Miss.
94
100
98
102
104
101
98
Memphis, Tenn.
91
100
99
103
102
98
96
Little Rock, Ark.
89
109
107
106
104
102
100
Springfield, Mo.
89
90
103
99
94
92
89
Topeka, Kan.
88
78
106
93
90
90
88
Olathe, Kan.
87
76
103
94
90
88
86
Nashville, Tenn.
86
91
92
99
106
102
95
Overland Park, Kan.
86
75
103
95
90
88
86
Kansas City, Kan.
86
76
105
95
90
88
88
Lawrence, Kan.
85
78
105
95
90
87
87
Fayetteville, Ark.
80
99
104
97
97
96
95
Source: NOAA • Note: Forecast data is as of 8:15 a.m. Eastern on August 12, 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, West and Midwest.
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°
Tuesday, Aug. 13
Wednesday, Aug. 14
Thursday, Aug. 15
Friday, Aug. 16
Saturday, Aug. 17
Sunday, Aug. 18
Source: NOAA • Note: Forecast data is as of 8:15 a.m. Eastern on August 12, 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 8:13 a.m. on Aug. 12, 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.
