The National Weather Service (NWS) has extended a heat advisory through 8 p.m. on Sept. 19 as a persistent heat dome drives record-breaking temperatures and dangerous humidity across 12 states.
Nashville broke a near-century-old heat record on Sept. 15, reaching 100°F—the highest temperature recorded since 1927, when the previous record of 98°F was set. The NWS Nashville office warned that record-high temperatures remain in jeopardy daily as the heat ridge intensifies. BNA Airport recorded 100°F on Sept. 16, with forecasts suggesting similar conditions through the week. Heat indexes could climb as high as 108°F in Middle Tennessee, including Murfreesboro and Rutherford County.
Across the broader region, the NWS has issued advisories for Alabama, Arkansas, Illinois, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Oklahoma, Tennessee, and Texas. The Weather Prediction Center (WPC) reported that temperatures in parts of the Southern Plains and lower Mississippi Valley may challenge daily records, with some areas expected to reach 110°F. In northeastern Texas, Texarkana is forecasted to hit 109°F, while eastern Oklahoma and western Arkansas could see heat indexes up to 107°F.
Murfreesboro-area residents and local institutions are urged to take precautions, including staying hydrated, avoiding strenuous outdoor activity during peak heat, and checking on vulnerable populations such as older adults, young children, and those without reliable air conditioning. Rutherford County schools, outdoor sports programs, and employers with outdoor workers are advised to monitor conditions closely as elevated temperatures persist.
The NWS Nashville office noted that September 2024 is on track to be the second-hottest on record, with trends suggesting it may ultimately surpass previous benchmarks. Meteorologists attribute the prolonged heat to a strong upper-level high pressure system associated with the heat dome, which shows little sign of weakening in the coming days.