By Rishav Kothari
Monday, September 14, 2026 12:47 UTC
Heat Advisories issued by 16 #NationalWeatherService ( #NWS ) #forecast offices cover portions of 12 U.S. states from September 14 through September 16, 2026, with heat index values forecast to reach 46°C (114°F) in southern Texas. The advisories extend from Texas and #Oklahoma through the Lower #Mississippi Valley and Mid-South into Indiana and #Kentucky.
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 #WeatherPredictionCenter ( #WPC ) said an upper-level ridge will shift from the Southeast toward the central #UnitedStates 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.
–