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June 27, 2026 to September 4, 2026

Extreme Heat Warnings in Illinois: every notice

50 notices from June 27, 2026 to September 4, 2026 of Extreme Heat Warnings in Illinois.

June 27, 2026 to September 4, 2026

  1. Extreme Heat Warning: Madison, St. Clair, Monroe and 4 more, IL and MO Madison, St. Clair, Monroe and 4 more expired
  2. Extreme Heat Warning: Benton, Linn, Iowa and 20 more, IA and IL Benton, Linn, Iowa and 20 more expired
  3. Extreme Heat Warning: Buchanan, Delaware, Dubuque and 10 more, IA and IL Buchanan, Delaware, Dubuque and 10 more expired
  4. Extreme Heat Warning: Clinton, Washington, Randolph and 3 more, IL and MO Clinton, Washington, Randolph and 3 more expired
  5. Extreme Heat Warning: Buchanan, Delaware, Dubuque and 10 more, IA and IL Buchanan, Delaware, Dubuque and 10 more expired
  6. Extreme Heat Warning: Iowa, Johnson, Cedar and 18 more, IA and IL Iowa, Johnson, Cedar and 18 more expired
  7. Extreme Heat Warning: Northern Cook, Central Cook and Southern Cook, IL Northern Cook, Central Cook and Southern Cook expired
  8. Extreme Heat Warning: Jefferson, Wayne, Edwards and 55 more, IL and IN Jefferson, Wayne, Edwards and 55 more expired
  9. Extreme Heat Warning: Knox, Stark, Peoria and 32 more, IL Knox, Stark, Peoria and 32 more expired
  10. Extreme Heat Warning: Greene, Macoupin, Montgomery and 30 more, IL and MO Greene, Macoupin, Montgomery and 30 more expired
  11. Extreme Heat Warning: Winnebago, Boone, McHenry and 21 more, IL and IN Winnebago, Boone, McHenry and 21 more expired
  12. Extreme Heat Warning: Buchanan, Delaware, Dubuque and 12 more, IA and IL Buchanan, Delaware, Dubuque and 12 more expired
  13. Extreme Heat Warning: Iowa, Johnson, Cedar and 18 more, IA and IL Iowa, Johnson, Cedar and 18 more expired
  14. Extreme Heat Warning: Northern Cook, Central Cook and Southern Cook, IL Northern Cook, Central Cook and Southern Cook expired
  15. Extreme Heat Warning: Winnebago, Boone, McHenry and 21 more, IL and IN Winnebago, Boone, McHenry and 21 more expired
  16. Extreme Heat Warning: Clinton, Whiteside, Henry and 2 more, IA and IL Clinton, Whiteside, Henry and 2 more expired
  17. Extreme Heat Warning: Iowa, Johnson, Cedar and 18 more, IA and IL Iowa, Johnson, Cedar and 18 more expired
  18. Extreme Heat Warning: Kankakee, Livingston, Iroquois and 4 more, IL and IN Kankakee, Livingston, Iroquois and 4 more expired
  19. Extreme Heat Warning: Clinton, Washington, Randolph and 17 more, IL and MO Clinton, Washington, Randolph and 17 more expired
  20. Extreme Heat Warning: Greene, Macoupin, Montgomery and 23 more, IL and MO Greene, Macoupin, Montgomery and 23 more expired
  21. Extreme Heat Warning: Jefferson, Perry, Franklin and 42 more, IL and KY Jefferson, Perry, Franklin and 42 more expired
  22. Extreme Heat Warning: White, Posey, Vanderburgh and 5 more, IL and IN White, Posey, Vanderburgh and 5 more expired
  23. Extreme Heat Warning: Buchanan, Delaware, Dubuque and 30 more, IA and IL Buchanan, Delaware, Dubuque and 30 more expired
  24. Extreme Heat Warning: Knox, Stark, Peoria and 11 more, IL Knox, Stark, Peoria and 11 more expired
  25. Extreme Heat Warning: Greene, Macoupin, Montgomery and 30 more, IL and MO Greene, Macoupin, Montgomery and 30 more expired
  26. Extreme Heat Warning: Madison, St. Clair, Monroe and 4 more, IL and MO Madison, St. Clair, Monroe and 4 more expired
  27. Extreme Heat Warning: Wayne, Hamilton, Saline and 4 more, IL and KY Wayne, Hamilton, Saline and 4 more expired
  28. Extreme Heat Warning: Jo Daviess, Stephenson, Carroll and 3 more, IL Jo Daviess, Stephenson, Carroll and 3 more expired
  29. Extreme Heat Warning: Champaign, Douglas, Coles and 4 more, IL Champaign, Douglas, Coles and 4 more expired
  30. Extreme Heat Warning: Marshall, Woodford, McLean and 8 more, IL Marshall, Woodford, McLean and 8 more expired
  31. Extreme Heat Warning: Boone, McHenry, Kane and 6 more, IL Boone, McHenry, Kane and 6 more expired
  32. Extreme Heat Warning: Vermilion, Edgar and Clark, IL Vermilion, Edgar and Clark expired
  33. Extreme Heat Warning: St. Clair, Monroe and Jefferson, IL and MO St. Clair, Monroe and Jefferson expired
  34. Extreme Heat Warning: Washington, Randolph, Crawford and 6 more, IL and MO Washington, Randolph, Crawford and 6 more expired
  35. Extreme Heat Warning: Clinton, Washington, Randolph and 16 more, IL and MO Clinton, Washington, Randolph and 16 more expired
  36. Extreme Heat Warning: Perry, IL Perry expired
  37. Extreme Heat Warning: Clinton, Washington, Randolph and 16 more, IL and MO Clinton, Washington, Randolph and 16 more expired
  38. Extreme Heat Warning: Jefferson, Wayne, Edwards and 54 more, IL and IN Jefferson, Wayne, Edwards and 54 more expired
  39. Extreme Heat Warning: Perry, IL Perry expired
  40. Extreme Heat Warning: Clinton, Washington, Randolph and 23 more, IL and MO Clinton, Washington, Randolph and 23 more expired
  41. Extreme Heat Warning: Jefferson, Wayne, Edwards and 55 more, IL and IN Jefferson, Wayne, Edwards and 55 more expired
  42. Extreme Heat Warning: Marion, IL Marion expired
  43. Extreme Heat Warning: Jefferson, Wayne, Edwards and 55 more, IL and IN Jefferson, Wayne, Edwards and 55 more expired
  44. Extreme Heat Warning: Iowa, Johnson, Cedar and 21 more, IA and IL Iowa, Johnson, Cedar and 21 more expired
  45. Extreme Heat Warning: Knox, Stark, Peoria and 32 more, IL Knox, Stark, Peoria and 32 more expired
  46. Extreme Heat Warning: Greene, Macoupin, Montgomery and 36 more, IL and MO Greene, Macoupin, Montgomery and 36 more expired
  47. Extreme Heat Warning: Madison, St. Clair, Monroe and 4 more, IL and MO Madison, St. Clair, Monroe and 4 more expired
  48. Extreme Heat Warning: Northern Cook, Central Cook and Southern Cook, IL Northern Cook, Central Cook and Southern Cook expired
  49. Extreme Heat Warning: Knox, Stark, Peoria and 17 more, IL Knox, Stark, Peoria and 17 more expired
  50. Extreme Heat Warning: Schuyler, Cass, Menard and 12 more, IL Schuyler, Cass, Menard and 12 more expired

Source: National Weather Service alerts (api.weather.gov). A U.S. Government work, in the public domain.

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Extreme Heat Warnings in Illinois