Heat Wave Risk in Missouri
All Missouri counties ranked by FEMA National Risk Index heat wave score
Heat Wave risk — prolonged periods of extreme heat that threaten health and infrastructure — is rated for 115 of 115 Missouri counties in FEMA's National Risk Index. St. Louis County carries the state's highest heat wave score at 99.9, with $253M in expected annual heat wave losses.
5 Missouri counties are rated High or Very High for heat wave, and expected annual losses from heat wave total roughly $711M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Heat Wave
| # | County | Heat Wave Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | St. Louis County | Very High | 14.84 / yr | $253M | |
| 2 | St. Louis City | Very High | 15.05 / yr | $172M | |
| 3 | Jackson County | High | 14.95 / yr | $36M | |
| 4 | Greene County | High | 13.42 / yr | $17M | |
| 5 | Clay County | High | 14.84 / yr | $12M | |
| 6 | Iron County | Medium | 10.63 / yr | $6M | |
| 7 | Washington County | Medium | 10.89 / yr | $6M | |
| 8 | St. Francois County | Medium | 10.89 / yr | $6M | |
| 9 | St. Charles County | Medium | 14.74 / yr | $12M | |
| 10 | Jasper County | Medium | 16.42 / yr | $5M | |
| 11 | Cole County | Medium | 12.26 / yr | $7M | |
| 12 | Boone County | Medium | 12.05 / yr | $6M | |
| 13 | Franklin County | Medium | 12.11 / yr | $6M | |
| 14 | Scotland County | Medium | 9.21 / yr | $3M | |
| 15 | Butler County | Medium | 11.63 / yr | $4M | |
| 16 | Ste. Genevieve County | Medium | 11.16 / yr | $6M | |
| 17 | Lincoln County | Medium | 11.53 / yr | $5M | |
| 18 | Warren County | Medium | 11.89 / yr | $6M | |
| 19 | Cape Girardeau County | Medium | 10.95 / yr | $4M | |
| 20 | Jefferson County | Medium | 13.21 / yr | $5M | |
| 21 | Camden County | Medium | 12.79 / yr | $3M | |
| 22 | Callaway County | Medium | 11.95 / yr | $3M | |
| 23 | Platte County | Medium | 14.89 / yr | $5M | |
| 24 | Newton County | Medium | 15.47 / yr | $3M | |
| 25 | Phelps County | Medium | 11.63 / yr | $3M | |
| 26 | Buchanan County | Medium | 12.26 / yr | $3M | |
| 27 | Pulaski County | Medium | 12.05 / yr | $4M | |
| 28 | Dunklin County | Medium | 18.42 / yr | $2M | |
| 29 | Christian County | Medium | 13.16 / yr | $4M | |
| 30 | Cass County | Medium | 14.95 / yr | $4M | |
| 31 | Pike County | Medium | 9.68 / yr | $3M | |
| 32 | Taney County | Medium | 13.21 / yr | $2M | |
| 33 | New Madrid County | Medium | 11.53 / yr | $2M | |
| 34 | Pettis County | Medium | 12.84 / yr | $3M | |
| 35 | Knox County | Medium | 8.42 / yr | $2M | |
| 36 | Texas County | Medium | 11.79 / yr | $2M | |
| 37 | Crawford County | Medium | 10.74 / yr | $2M | |
| 38 | Morgan County | Medium | 13.16 / yr | $1M | |
| 39 | Montgomery County | Medium | 11.32 / yr | $2M | |
| 40 | Howell County | Medium | 12.11 / yr | $2M | |
| 41 | Laclede County | Medium | 12.16 / yr | $2M | |
| 42 | Worth County | Medium | 9.11 / yr | $2M | |
| 43 | Scott County | Medium | 11.26 / yr | $2M | |
| 44 | Audrain County | Medium | 10.58 / yr | $2M | |
| 45 | Stoddard County | Medium | 11.58 / yr | $2M | |
| 46 | Miller County | Medium | 12.47 / yr | $2M | |
| 47 | Pemiscot County | Medium | 18.05 / yr | $1M | |
| 48 | Reynolds County | Medium | 10.63 / yr | $2M | |
| 49 | Lawrence County | Medium | 13.79 / yr | $2M | |
| 50 | Ozark County | Medium | 12.58 / yr | $1M | |
| 51 | Madison County | Medium | 10.84 / yr | $2M | |
| 52 | Clark County | Medium | 9.26 / yr | $2M | |
| 53 | Barry County | Medium | 13.74 / yr | $2M | |
| 54 | Lewis County | Medium | 8.42 / yr | $2M | |
| 55 | Monroe County | Medium | 9.53 / yr | $2M | |
| 56 | Wayne County | Medium | 11.32 / yr | $1M | |
| 57 | Gentry County | Medium | 9.11 / yr | $1M | |
| 58 | Moniteau County | Medium | 12.26 / yr | $2M | |
| 59 | Webster County | Medium | 12.37 / yr | $2M | |
| 60 | Polk County | Medium | 13.68 / yr | $1M | |
| 61 | Stone County | Medium | 13.21 / yr | $1M | |
| 62 | Johnson County | Medium | 13.63 / yr | $2M | |
| 63 | Saline County | Medium | 12.11 / yr | $1M | |
| 64 | Wright County | Medium | 12.05 / yr | $1M | |
| 65 | Shelby County | Medium | 8.79 / yr | $2M | |
| 66 | Marion County | Medium | 8.89 / yr | $2M | |
| 67 | Gasconade County | Medium | 11.58 / yr | $2M | |
| 68 | Osage County | Medium | 12.21 / yr | $2M | |
| 69 | Dent County | Medium | 11.32 / yr | $1M | |
| 70 | Randolph County | Low | 10.00 / yr | $2M | |
| 71 | Benton County | Low | 14.00 / yr | $902K | |
| 72 | Ripley County | Low | 11.42 / yr | $965K | |
| 73 | Lafayette County | Low | 12.95 / yr | $1M | |
| 74 | Shannon County | Low | 11.84 / yr | $718K | |
| 75 | Vernon County | Low | 16.05 / yr | $1M | |
| 76 | Ralls County | Low | 9.53 / yr | $2M | |
| 77 | McDonald County | Low | 15.16 / yr | $1M | |
| 78 | Perry County | Low | 10.58 / yr | $1M | |
| 79 | Douglas County | Low | 12.58 / yr | $789K | |
| 80 | Dallas County | Low | 13.16 / yr | $784K | |
| 81 | Ray County | Low | 12.11 / yr | $895K | |
| 82 | Henry County | Low | 13.84 / yr | $726K | |
| 83 | Oregon County | Low | 12.37 / yr | $611K | |
| 84 | Cooper County | Low | 12.42 / yr | $1M | |
| 85 | Cedar County | Low | 15.37 / yr | $691K | |
| 86 | Daviess County | Low | 9.63 / yr | $601K | |
| 87 | Harrison County | Low | 8.79 / yr | $592K | |
| 88 | Adair County | Low | 7.84 / yr | $928K | |
| 89 | Carter County | Low | 11.26 / yr | $439K | |
| 90 | Maries County | Low | 12.37 / yr | $724K | |
| 91 | Linn County | Low | 9.42 / yr | $590K | |
| 92 | Dade County | Low | 14.63 / yr | $587K | |
| 93 | Mississippi County | Low | 11.11 / yr | $569K | |
| 94 | Chariton County | Low | 10.32 / yr | $588K | |
| 95 | Bates County | Low | 14.95 / yr | $587K | |
| 96 | Atchison County | Low | 9.42 / yr | $589K | |
| 97 | Clinton County | Low | 11.63 / yr | $768K | |
| 98 | Macon County | Low | 8.79 / yr | $589K | |
| 99 | Barton County | Low | 16.32 / yr | $533K | |
| 100 | Howard County | Low | 11.68 / yr | $748K | |
| 101 | Grundy County | Low | 8.95 / yr | $520K | |
| 102 | Nodaway County | Low | 9.32 / yr | $601K | |
| 103 | St. Clair County | Low | 15.00 / yr | $362K | |
| 104 | Hickory County | Low | 13.84 / yr | $345K | |
| 105 | Livingston County | Low | 10.37 / yr | $590K | |
| 106 | Bollinger County | Low | 10.89 / yr | $525K | |
| 107 | Carroll County | Low | 11.21 / yr | $399K | |
| 108 | Holt County | Low | 10.00 / yr | $440K | |
| 109 | Andrew County | Low | 9.95 / yr | $545K | |
| 110 | Caldwell County | Low | 11.00 / yr | $308K | |
| 111 | Sullivan County | Low | 8.11 / yr | $295K | |
| 112 | Putnam County | Low | 7.95 / yr | $256K | |
| 113 | Mercer County | Low | 8.53 / yr | $230K | |
| 114 | DeKalb County | Low | 9.89 / yr | $331K | |
| 115 | Schuyler County | Very Low | 7.89 / yr | $146K |
115 Missouri counties with measurable heat wave risk. See the national heat wave ranking or all Missouri counties by overall risk.
Frequently Asked Questions
Which Missouri county has the highest heat wave risk?
St. Louis County has the highest FEMA heat wave risk score in Missouri at 99.9 (Very High), with $253M in expected annual losses and about 14.84 events per year.
How many Missouri counties face significant heat wave risk?
115 Missouri counties record measurable heat wave risk in FEMA's National Risk Index; 5 of them are rated High or Very High.