Excessive Heat Is Threatening These Major Cities Right Now

In case you haven’t noticed, it’s hot out there. Dangerous heat levels have been forecast for large swaths of the South, West, and Midwest, with about 32.9 million people, or about 10 percent of the population of the contiguous United States, expected to have heat levels that are downright dangerous. Some major cities are also expected to be sweltering.

Every year, hundreds of people die from extreme heat in the United States. In order to deal with this heat, the National Weather Service recommends staying hydrated, staying out of the sun, and seeking refuge in a cool room. It’s also recommended that you check in on relatives and neighbors – especially the elderly and those who live alone – to make sure that they’re doing okay.

When gauging how hot it is, it’s important to not just take the temperature into account, but the heat index. The heat index is a measure of both heat and humidity – which makes heat more oppressive by not allowing sweat to effectively evaporate from your body – in the shade. In the sun, a person could perceive the temperature as being up to 15 degrees F warmer. The National Weather Service categorizes a heat index of 80-90 degrees as “Caution,” 90-103 degrees as “Extreme Caution,” and 103-125 as “Danger.”

In the “danger” zone of 103-125 degree heat index, heat cramps or heat exhaustion is likely, with heat stroke possible after long exposure or exercise. Above 125 degrees, heat stroke is highly likely.

To determine the major cities being threatened by excessive heat, 24/7 Tempo reviewed data on current weather warnings and advisories from the NOAA’s National Weather Service . Cities whose land area fall at least 50% within the boundaries of an NWS excessive heat warning as of July 11, 2024 were ordered by maximum observed temperature during the period July 1-8, 2024. Temperature data is from the NOAA’s nClimGrid-Daily program and was aggregated from the census tract level to the place level using boundary definitions from the U.S. Census Bureau’s TIGER/Line shapefiles program. Only cities with at least 100,000 residents were considered. Population data is from the Census Bureau’s 2022 American Community Survey .

If you live in any of these cities, try to stay cool. You might also be living in a city where summer is getting hotter .

65. Provo, UT

Source: Sean Pavone / iStock via Getty Images

• Share of city under excessive heat advisory: 67.8%
• Maximum temperature, July 1-8, 2024: 92.4°F
• Average temperature, July 1-8, 2024: 68.7°F
• Total population: 114,400

64. Los Angeles, CA

Source: shalunts / iStock via Getty Images

• Share of city under excessive heat advisory: 60.1%
• Maximum temperature, July 1-8, 2024: 92.5°F
• Average temperature, July 1-8, 2024: 75.4°F
• Total population: 3,881,041

63. El Cajon, CA

Source: Mindy_Nicole_Photography / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 93.8°F
• Average temperature, July 1-8, 2024: 78.2°F
• Total population: 105,721

62. Sunnyvale, CA

Source: Sundry Photography / iStock via Getty Images

• Share of city under excessive heat advisory: 70.6%
• Maximum temperature, July 1-8, 2024: 95.0°F
• Average temperature, July 1-8, 2024: 74.0°F
• Total population: 154,573

61. Escondido, CA

Source: Art Wager / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 95.1°F
• Average temperature, July 1-8, 2024: 78.6°F
• Total population: 151,114

60. Boise City, ID

Source: peeterv / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 95.7°F
• Average temperature, July 1-8, 2024: 72.8°F
• Total population: 234,192

59. West Jordan, UT

Gardner Mill West Jordan Utah.jpeg ( CC BY-SA 3.0 ) by Tricia Simpson

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 96.2°F
• Average temperature, July 1-8, 2024: 70.9°F
• Total population: 116,383

58. Salt Lake City, UT

Source: DenisTangneyJr / E+ via Getty Images

• Share of city under excessive heat advisory: 81.2%
• Maximum temperature, July 1-8, 2024: 96.3°F
• Average temperature, July 1-8, 2024: 70.9°F
• Total population: 201,269

57. El Monte, CA

Source: Kit Leong / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 96.8°F
• Average temperature, July 1-8, 2024: 79.3°F
• Total population: 108,682

56. Meridian, ID

Meridian-idaho-usa-city-hall ( CC0 1.0 ) by Dmharris26

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 97.0°F
• Average temperature, July 1-8, 2024: 73.8°F
• Total population: 119,872

55. Thousand Oaks, CA

Source: LPETTET / iStock via Getty Images

• Share of city under excessive heat advisory: 99.2%
• Maximum temperature, July 1-8, 2024: 97.3°F
• Average temperature, July 1-8, 2024: 76.3°F
• Total population: 126,532

54. Santa Clara, CA

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 97.6°F
• Average temperature, July 1-8, 2024: 76.4°F
• Total population: 128,058

53. West Covina, CA

Source: Matt Gush / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 97.7°F
• Average temperature, July 1-8, 2024: 79.9°F
• Total population: 108,173

52. Burbank, CA

Source: P_Wei / E+ via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 97.8°F
• Average temperature, July 1-8, 2024: 78.5°F
• Total population: 106,389

51. Nampa, ID

Source: Jacob Boomsma / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 97.9°F
• Average temperature, July 1-8, 2024: 74.2°F
• Total population: 102,598

50. West Valley City, UT

Source: SevenMaps / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 98.5°F
• Average temperature, July 1-8, 2024: 72.6°F
• Total population: 138,868

49. San Jose, CA

Source: GerardoBrucker / iStock via Getty Images

• Share of city under excessive heat advisory: 84.9%
• Maximum temperature, July 1-8, 2024: 99.1°F
• Average temperature, July 1-8, 2024: 79.1°F
• Total population: 1,001,176

48. Corona, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 99.1%
• Maximum temperature, July 1-8, 2024: 99.4°F
• Average temperature, July 1-8, 2024: 80.6°F
• Total population: 158,346

47. Temecula, CA

Source: Ron and Patty Thomas / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 99.7°F
• Average temperature, July 1-8, 2024: 80.8°F
• Total population: 110,114

46. Pasadena, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 99.9°F
• Average temperature, July 1-8, 2024: 80.0°F
• Total population: 137,554

45. Pomona, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 100.1°F
• Average temperature, July 1-8, 2024: 81.1°F
• Total population: 149,831

44. Glendale, CA

Source: Davel5957 / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 100.1°F
• Average temperature, July 1-8, 2024: 79.7°F
• Total population: 194,512

43. Murrieta, CA

Source: Jacob Findlay / Shutterstock.com

• Share of city under excessive heat advisory: 99.8%
• Maximum temperature, July 1-8, 2024: 100.4°F
• Average temperature, July 1-8, 2024: 80.9°F
• Total population: 111,899

42. Reno, NV

Source: alacatr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 100.5°F
• Average temperature, July 1-8, 2024: 75.0°F
• Total population: 265,196

41. Ontario, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 101.4°F
• Average temperature, July 1-8, 2024: 82.3°F
• Total population: 176,326

40. Simi Valley, CA

Source: EFA2015 / Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 101.5°F
• Average temperature, July 1-8, 2024: 78.9°F
• Total population: 126,153

39. Jurupa Valley, CA

Source: Matt Gush / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 102.3°F
• Average temperature, July 1-8, 2024: 83.1°F
• Total population: 105,672

38. Riverside, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 102.6°F
• Average temperature, July 1-8, 2024: 82.8°F
• Total population: 316,076

37. Menifee, CA

Source: Thomas De Wever / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 102.6°F
• Average temperature, July 1-8, 2024: 81.8°F
• Total population: 103,680

36. Sparks, NV

Source: OJUP / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 103.2°F
• Average temperature, July 1-8, 2024: 76.7°F
• Total population: 108,025

35. Rancho Cucamonga, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 99.4%
• Maximum temperature, July 1-8, 2024: 103.7°F
• Average temperature, July 1-8, 2024: 82.8°F
• Total population: 174,696

34. Fontana, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 104.3°F
• Average temperature, July 1-8, 2024: 83.8°F
• Total population: 209,279

33. Rialto, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 105.5°F
• Average temperature, July 1-8, 2024: 84.5°F
• Total population: 103,873

32. Moreno Valley, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 105.6°F
• Average temperature, July 1-8, 2024: 83.8°F
• Total population: 209,578

31. Santa Clarita, CA

Source: trekandshoot / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 105.9°F
• Average temperature, July 1-8, 2024: 82.3°F
• Total population: 225,850

30. Concord, CA

Source: MichaelRLopez / iStock Editorial via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 106.3°F
• Average temperature, July 1-8, 2024: 83.6°F
• Total population: 125,007

29. San Bernardino, CA

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 99.0%
• Maximum temperature, July 1-8, 2024: 106.5°F
• Average temperature, July 1-8, 2024: 85.2°F
• Total population: 221,041

28. Palmdale, CA

Palmdale and Mountains ( Public Domain ) by Jamesb01

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 108.3°F
• Average temperature, July 1-8, 2024: 85.8°F
• Total population: 166,895

27. Antioch, CA

Source: Skyhobo / iStock via Getty Images

• Share of city under excessive heat advisory: 98.2%
• Maximum temperature, July 1-8, 2024: 108.3°F
• Average temperature, July 1-8, 2024: 85.4°F
• Total population: 115,016

26. Bakersfield, CA

Source: Matt Gush / Shutterstock.com

• Share of city under excessive heat advisory: 99.9%
• Maximum temperature, July 1-8, 2024: 109.1°F
• Average temperature, July 1-8, 2024: 88.8°F
• Total population: 404,321

25. Victorville, CA

Source: sanfel / iStock Editorial via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 109.3°F
• Average temperature, July 1-8, 2024: 86.7°F
• Total population: 134,417

24. Modesto, CA

Source: Matt Gush / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 109.3°F
• Average temperature, July 1-8, 2024: 87.9°F
• Total population: 218,308

23. Tucson, AZ

Source: toddtaulman / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 109.5°F
• Average temperature, July 1-8, 2024: 90.4°F
• Total population: 541,033

22. Lancaster, CA

Source: 2021 Getty Images / Getty Images News via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 109.7°F
• Average temperature, July 1-8, 2024: 87.3°F
• Total population: 171,465

21. Vacaville, CA

Source: Justin Sullivan / Getty Images News via Getty Images

• Share of city under excessive heat advisory: 83.6%
• Maximum temperature, July 1-8, 2024: 110.4°F
• Average temperature, July 1-8, 2024: 85.9°F
• Total population: 101,631

20. Stockton, CA

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 71.6%
• Maximum temperature, July 1-8, 2024: 110.5°F
• Average temperature, July 1-8, 2024: 87.5°F
• Total population: 320,030

19. Elk Grove, CA

Source: EG-Richard / Wikimedia Commons

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 112.3°F
• Average temperature, July 1-8, 2024: 87.9°F
• Total population: 176,105

18. Sacramento, CA

Source: DustyPixel / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 112.6°F
• Average temperature, July 1-8, 2024: 87.9°F
• Total population: 523,600

17. Scottsdale, AZ

Source: dszc / E+ via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 112.7°F
• Average temperature, July 1-8, 2024: 93.9°F
• Total population: 240,537

16. Roseville, CA

Source: Devin Powers / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 112.8°F
• Average temperature, July 1-8, 2024: 88.2°F
• Total population: 148,879

15. Las Vegas, NV

Source: f11photo / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 113.8°F
• Average temperature, July 1-8, 2024: 93.6°F
• Total population: 644,835

14. Chico, CA

Source: aguilar3137 / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.0°F
• Average temperature, July 1-8, 2024: 90.3°F
• Total population: 102,790

13. Fresno, CA

Fresno ( Shutterstock.com ) by Jacob Boomsma

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.1°F
• Average temperature, July 1-8, 2024: 90.4°F
• Total population: 541,528

12. Peoria, AZ

Afternoon aerial view of sprawling suburban single family housing in Peoria, Arizona, USA. ( Shutterstock.com ) by Matt Gush

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.3°F
• Average temperature, July 1-8, 2024: 95.4°F
• Total population: 191,292

11. Visalia, CA

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.3°F
• Average temperature, July 1-8, 2024: 90.8°F
• Total population: 141,466

10. Clovis, CA

Source: mARTin nunez photography / Shutterstock.com

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.4°F
• Average temperature, July 1-8, 2024: 90.6°F
• Total population: 120,607

9. North Las Vegas, NV

Source: Pavliha / iStock Unreleased via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 114.5°F
• Average temperature, July 1-8, 2024: 94.1°F
• Total population: 264,022

8. Mesa, AZ

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 115.4°F
• Average temperature, July 1-8, 2024: 97.1°F
• Total population: 503,390

7. Gilbert, AZ

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 115.5°F
• Average temperature, July 1-8, 2024: 97.5°F
• Total population: 267,267

6. Surprise, AZ

Source: MattGush / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 115.6°F
• Average temperature, July 1-8, 2024: 96.9°F
• Total population: 145,591

5. Phoenix, AZ

Source: Kruck20 / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 115.7°F
• Average temperature, July 1-8, 2024: 97.3°F
• Total population: 1,609,456

4. Chandler, AZ

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 115.7°F
• Average temperature, July 1-8, 2024: 97.9°F
• Total population: 275,618

3. Tempe, AZ

Source: JeffreyRasmussen / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 116.1°F
• Average temperature, July 1-8, 2024: 98.1°F
• Total population: 181,005

2. Henderson, NV

Source: DenisTangneyJr / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 116.5°F
• Average temperature, July 1-8, 2024: 96.7°F
• Total population: 318,063

1. Glendale, AZ

Source: dszc / iStock via Getty Images

• Share of city under excessive heat advisory: 100.0%
• Maximum temperature, July 1-8, 2024: 116.7°F
• Average temperature, July 1-8, 2024: 98.3°F
• Total population: 248,083

The post Excessive Heat Is Threatening These Major Cities Right Now appeared first on 24/7 Tempo .