Heat Advisories span 12 states from Texas to Indiana, heat index up to 46°C (114°F) forecast

NWS Heat Advisories cover portions of Texas, Oklahoma, Kansas, Missouri, Arkansas, Louisiana, Mississippi, Alabama, Tennessee, Kentucky, Indiana, and Illinois. Maximum forecast heat indices range from 41°C (105°F) to 46°C (114°F), with the highest values in products issued by the Brownsville and Corpus Christi offices in South Texas.

While some advisories cover September 14 only, others remain in effect through September 15, and the latest Louisville and Paducah advisories continue until 20:00 LT / 19:00 LT on September 16.

The NWS Weather Prediction Center (WPC) said an upper-level ridge will shift from the Southeast toward the central United States during the week, supporting continued hazardous heat over the Southern Plains. NWS Paducah said a strong 500 hPa ridge is expected to expand from the southern Plains into the Mid-South, contributing to a late-season period of high temperatures and elevated humidity.

The advisories identify heat-related illness as the primary public-safety concern. Common precautions include staying hydrated, using air-conditioned spaces, and reducing strenuous outdoor activity, while the Tulsa office specifically identifies greater risk among people not acclimated to the heat and those performing strenuous work.

NWS Louisville, Kentucky

Heat index values up to 41°C (105°F) are forecast across portions of south-central Indiana and north-central, northwestern, and south-central Kentucky. The Louisville advisory, which includes Louisville, Bowling Green, Elizabethtown, Jeffersonville and New Albany, runs from 12:00 LT / 11:00 LT (16:00 UTC) on September 15 to 20:00 LT / 19:00 LT (00:00 UTC on September 17) on September 16.

NWS Springfield, Missouri

Southeastern Kansas and central, south-central, southwestern, and west-central Missouri remain under a Heat Advisory from 11:00 LT (16:00 UTC) on September 14 to 20:00 LT (01:00 UTC on September 16) on September 15. NWS Springfield forecasts heat index values up to 41°C (105°F), including around Springfield, Joplin, Branson, Fort Scott, and West Plains.

NWS Tulsa, Oklahoma

NWS Tulsa forecasts heat index values up to 42°C (107°F) from 12:00 LT (17:00 UTC) to 19:00 LT (00:00 UTC on September 15) on September 14 across portions of northwestern and west-central Arkansas and east-central, northeastern and southeastern Oklahoma. Delaware and Ottawa counties are also included. The office specifically identifies increased heat-illness risk for people not acclimated to the conditions and those performing strenuous activities.

NWS Norman, Oklahoma

Atoka, Bryan, Coal, Hughes, Johnston and Marshall counties are under a Heat Advisory from 12:00 LT (17:00 UTC) to 19:00 LT (00:00 UTC on September 15) on September 14. Heat indices are forecast to reach 42°C (108°F), including in Durant, Atoka, Tishomingo, Kingston, Coalgate, Madill, Holdenville and Wetumka.

NWS Little Rock, Arkansas

Large portions of central, eastern, north-central, southeastern, southwestern and western Arkansas remain under a Heat Advisory from 11:00 LT (16:00 UTC) on September 14 through 20:00 LT (01:00 UTC on September 16) on September 15. NWS Little Rock forecasts heat index values up to 43°C (110°F), with Little Rock, North Little Rock, Pine Bluff, Hot Springs, Russellville, Conway and Monticello among the listed communities.

NWS Jackson, Mississippi

Heat index values up to 43°C (110°F) are forecast across central, southern and eastern Mississippi, southeastern Arkansas and northeastern Louisiana from 11:00 LT (16:00 UTC) to 19:00 LT (00:00 UTC on September 15) on September 14. The Jackson advisory footprint includes Jackson, Vicksburg, Natchez, Hattiesburg, Meridian, Greenville and Columbus.

NWS Shreveport, Louisiana

A Heat Advisory covering portions of south-central and southwestern Arkansas, north-central and northwestern Louisiana, southeastern Oklahoma and eastern and northeastern Texas remains in effect until 19:00 LT (00:00 UTC on September 16) on September 15. NWS Shreveport forecasts heat index values up to 43°C (109°F), with Shreveport, Bossier City, Monroe, Texarkana, Tyler, Longview and Lufkin among the listed cities.

NWS Paducah, Kentucky

Daily peak heat index values up to 41°C (105°F) are forecast across parts of western Kentucky, southeastern Missouri, southern Illinois and southwestern Indiana. Fulton, Carlisle, Graves and Hickman counties in Kentucky and Butler, Carter, New Madrid, Ripley, Stoddard, Mississippi and Scott counties in Missouri are among the areas with advisories beginning at 11:00 LT (16:00 UTC) on September 14 and continuing until 19:00 LT (00:00 UTC on September 17) on September 16.

The larger Paducah advisory area across southern Illinois, southwestern Indiana, western Kentucky and southeastern Missouri begins at 11:00 LT / 12:00 LT (16:00 UTC) on September 15 and continues until 19:00 LT / 20:00 LT (00:00 UTC on September 17) on September 16.

NWS Nashville, Tennessee

A portion of Middle Tennessee is under a Heat Advisory from 11:00 LT (16:00 UTC) to 20:00 LT (01:00 UTC on September 16) on September 15, with heat indices forecast to reach 42°C (108°F). Nashville, Clarksville, Murfreesboro, Franklin, Columbia and Cookeville are among the communities included.

NWS Brownsville, Texas

Coastal and inland portions of Cameron, Kenedy and Willacy counties are under a Heat Advisory from 11:00 LT (16:00 UTC) to 18:00 LT (23:00 UTC) on September 14. NWS Brownsville forecasts heat index values up to 46°C (114°F), including around Brownsville, Harlingen, Raymondville, Port Mansfield, Port Isabel, Laguna Vista, and Sarita.

NWS Corpus Christi, Texas

Heat index values up to 46°C (114°F) are forecast from 12:00 LT (17:00 UTC) to 19:00 LT (00:00 UTC on September 15) on September 14. The advisory covers Bee, Duval, Goliad, Jim Wells, Live Oak, McMullen and Victoria counties, together with designated coastal or inland zones in Aransas, Calhoun, Kleberg, Nueces, Refugio and San Patricio counties.

NWS Fort Worth, Texas

The Heat Advisory for portions of North and Central Texas along and east of the I-35 corridor remains in effect through 20:00 LT (01:00 UTC on September 15) on September 14. Forecast heat indices reach 41°C (106°F) across an area including Dallas, Fort Worth, Arlington, Waco, Killeen, Denton, McKinney, Sherman and Corsicana. NWS Fort Worth identifies outdoor workers and people participating in outdoor activities among those at greater risk of heat-related illness.

NWS Austin/San Antonio, Texas

The I-35 corridor and Coastal Plains are under a Heat Advisory from 12:00 LT (17:00 UTC) to 19:00 LT (00:00 UTC on September 15) on September 14. Heat index values up to 44°C (111°F) are forecast across Williamson, Hays, Travis, Bastrop, Lee, Bexar, Comal, Guadalupe, Caldwell, Fayette, Atascosa, Wilson, Karnes, Gonzales, DeWitt and Lavaca counties.

NWS Memphis, Tennessee

Portions of eastern Arkansas, northern Mississippi, southeastern Missouri and western Tennessee remain under a Heat Advisory from 11:00 LT (16:00 UTC) on September 14 to 19:00 LT (00:00 UTC on September 16) on September 15. NWS Memphis forecasts heat index values up to 43°C (109°F), including across Memphis, Jonesboro, West Memphis, Tupelo, Oxford, Jackson, Dyersburg and Kennett.

NWS Houston/Galveston, Texas

A Heat Advisory for portions of south-central and southeastern Texas is in effect from 11:00 LT (16:00 UTC) to 18:00 LT (23:00 UTC) on September 14. Heat index values up to 43°C (109°F) are forecast across an area including Houston, College Station, Bryan, The Woodlands, Huntsville, Pearland and Bay City.

NWS Huntsville, Alabama

Limestone, Madison, Morgan, Colbert, Franklin, Lauderdale, and Lawrence counties in northern Alabama and Lincoln and Moore counties in Tennessee are under a Heat Advisory from 11:00 LT (16:00 UTC) to 20:00 LT (01:00 UTC on September 16) on September 15. Forecast heat indices reach 43°C (109°F), with Huntsville, Decatur, Florence, Athens, Muscle Shoals, Fayetteville, and Lynchburg among the listed communities.

References:

¹ Heat Advisory – NOAA/NWS – September 14, 2026