Excessive Heat in Missouri

Events

1,196

Deaths

68

Injuries

3,159

Damage

$400,000

• Excessive Heat in Missouri, August 4 to 16, 20078 deaths · 953 injured · 22 eventsThe first and only Heat Wave of the summer started in August 4th and lasted through August 16th. Eight deaths were reported in the St. Louis Metro area. The city of St. Louis reported 422 heat related injuries. St. Louis County reported 519 heat related injuries.
• Excessive Heat in Missouri, July 17 to 31, 20118 deaths · 389 injured · 22 eventsA major Heat Wave started on July 17th and continued into August. High temperatures ranged from the lower 90s to around 100. Columbia hit 100 on July 28 while St. Louis topped the century mark on six days, including four in a row from July 20 - 23.
• Excessive Heat in Missouri, July 1 to 8, 201217 deaths · 172 injured · 29 eventsA record setting heat wave continued from late June into July, finally breaking on July 9. Columbia, MO was over 100 degrees from June 27 - July 7. St. Louis, MO was over 100 degrees from June 28 - July 7. St.
• Excessive Heat in Missouri, June 27 to 30, 20122 deaths · 215 injured · 29 eventsSome of the hottest temperatures in many years occurred the last 4 days of June and continued into July. St. Louis, MO recorded its highest ever June temperature hitting 108 degrees on June 28.
• Excessive Heat in Missouri, June 17 to 27, 20092 deaths · 123 injured · 3 eventsThe first Heat Wave of the summer hit from June 17 through June 27. Heat Index values ranged from 100 to 107 during the period. High temperatures ranged from the lower to upper 90s. There were two deaths in St. Louis County from the heat with 80 injuries.
• Excessive Heat in Missouri, July 18 to 25, 20127 deaths · 38 eventsAn unusually strong upper level ridge of high pressure, dominated the central United States with very hot and dry conditions, from July 18th through 25th 2012. Temperatures topped out from 100 to 110 degrees.
• Excessive Heat in Missouri, August 8 to 14, 20102 deaths · 85 injured · 29 eventsA significant heat wave gripped the area for a week. High temperatures were mostly in the upper 90s to around 100. High moisture levels pushed the Heat Index to 110 - 115, the highest in several years.St. Louis hit 100 degrees on 8/11 and 8/13.
• Excessive Heat in Missouri, July 22 to 30, 2025115 injured · 15 eventsA period of hot and very humid weather began in mid July. Although thunderstorms brought some heat relief in the first few days, the heat and humidity expanded on July 22 and lasted through the 29th or 30th for many locations.
• Excessive Heat in Missouri, July 16 to 19, 20123 deaths · 53 injured · 22 eventsExcessive heat returned to the area as high temperatures ranged from 100 to 106. The Heat Index was a couple of degrees higher. St. Louis County reported one heat related death and 34 injuries. The City of St.
• Excessive Heat in Missouri, July 18 to 24, 20161 death · 70 injured · 29 eventsExcessive Heat gripped the area July 18th - July 24th. High temperatures ranged from the middle to upper 90s with the Heat Index up to 110 degrees. The St. Louis County Health Department reported 1 death and 70 injuries.
• Excessive Heat in Missouri, August 20 to 25, 202387 injured · 29 eventsA period of very hot and extremely humid weather began on Sunday, August 20 and lasted through Friday, August 25. Although the temperature rarely threatened climatological records, the humidity caused the heat index to reach extreme levels.
• Excessive Heat in Missouri, June 18 to 23, 201084 injured · 27 eventsThe first of several Heat Waves for the summer of 2010 started on June 18 and lasted through June 23. High temperatures were in the middle 90s with the heat index ranging from 100 - 105.
• Excessive Heat in Missouri, August 6 to 17, 20074 deaths · 37 eventsAn upper level ridge of high pressure, persisted across the area from August 6th through August 17th. The combination of heat and humidity, produced heat index readings in the 105 to 115 degree range.
• Excessive Heat in Missouri, July 17 to 25, 20111 death · 57 injured · $25,000 · 3 eventsA very strong upper level ridge of high pressure caused extreme heat to build over the Ozarks. This caused a section of a major road to buckle. During this period at least 57 heat related illnesses were reported along with one fatality.
• Excessive Heat in Missouri, June 4 to 8, 20111 death · 59 injured · 3 eventsThe first heat wave of the summer hit the St. Louis Metropolitan Area area in early June. High temperatures rose into the upper 90s with the Heat Index ranging form 100 - 105. The St.
• Excessive Heat in Missouri, July 22 to 27, 201275 injured · 29 eventsAfter a brief break, excessive heat returned once again. St. Louis hit 108 degrees on July 25 and Columbia hit 106 on the 25th. Again the air was relatively dry thus the heat index was only a couple of degrees higher. St.
• Excessive Heat in Missouri, July 20 to 21, 200868 injured · 3 eventsThe first excessive heat of the summer hit on July 20th to 21st. High temperatures across the region ranged from 97 to 99 degrees. However the humid air produced Heat Index readings from 105 to 110 degrees.
• Excessive Heat in Missouri, July 4 to 7, 20123 deaths · 3 eventsAn upper level ridge of high pressure, brought dangerously hot conditions, to west central Missouri, July 4th through 7th, 2012.
• Excessive Heat in Missouri, August 1 to 3, 201152 injured · 29 eventsThe Heat Wave that started in mid July continued into the first three days of August. Many locations across the area topped the 100 degree mark on the 1st and 2nd. Columbia set a record for August 2nd hitting 108 degrees. The Heat Index ranged from 105 to 115.
• Excessive Heat in Missouri, July 12, 201155 injured · 1 eventA persistent ridge of high pressure over the region allowed temperatures to climb into the 90s and up to 106 degrees across portions of the Missouri Ozarks. Western Missouri experienced the warmest temperatures during this period.
• Excessive Heat in Missouri, July 18 to 23, 201751 injured · 20 eventsAn excessive heat wave high central through east central Missouri July 18 - 23. high temperatures ranged from the upper 90s to a high in St. Louis on July 22 of 108 degrees. The heat index ranged from 105 to around 110. The St.
• Excessive Heat in Missouri, July 12 to 14, 201550 injured · 23 eventsThe first excessive heat event of the summer produced max heat index values around 110 with high temperatures in the middle to upper 90s.
• Excessive Heat in Missouri, July 27 to 29, 202350 injured · 12 eventsStrong upper level ridge built up over the region from July 25th through 29th. This ushered in much warmer air and higher dewpoints. So heat index values 100+ were reported from July 25th through 29th.
• Excessive Heat in Missouri, June 15 to 19, 201845 injured · 4 eventsA dangerous combination of heat and humidity overspread the region beginning on June 15th and persisted through June 19th. There were 45 heat related illnesses reported in St. Louis County & the City of St. Louis during this event.
• Excessive Heat in Missouri, July 10 to 12, 20112 deaths · 11 eventsHigh pressure in the middle and upper levels of the atmosphere expanded east-northeast from the southern Plains. As this high expanded across southern Missouri, it brought a few days of excessive heat and humidity.

Excessive Heat everywhereEvery kind of event in Missouri

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.