Mosquitoes are officially more than an annoyance. Recent worries about the Zika virus, as well as other serious diseases spread by the insect, have raised the level of concern.

Pest control company Orkin ranked a list of the top mosquito cities, based on the number of customers serviced for the insects in 2015. The Atlanta area topped the list for the third year in a row with eight other cities in the Southeast included in the top rankings — more than any other area of the country.

“Mosquitoes are a major health concern during the summer,” said Ron Harrison, Ph.D., entomologist and Orkin technical services director. “Mosquitoes are known carriers of several diseases, including Zika virus, Chikungunya virus and West Nile virus, so people across the United States — whether their city is on the list or not — need to take precaution to help prevent mosquito bites.”

Mosquitoes are equal-opportunity offenders, appearing in every state in the U.S., but here are the cities where the bugs are more likely to be found:

  1. Atlanta
  2. Chicago
  3. Washington, D.C.
  4. Detroit
  5. New York
  6. Dallas-Ft. Worth
  7. Nashville, Tenn.
  8. Charlotte, N.C.
  9. Raleigh-Durham, N.C.
  10. Boston
  11. Memphis, Tenn.
  12. Houston
  13. Miami-Ft. Lauderdale, Fla.
  14. Norfolk-Portsmouth-Newport News, Va.
  15. Grand Rapids-Kalamazoo-Battle Creek, Mich.
  16. Greenville-Spartanburg, S.C., Asheville, N.C.
  17. Albany-Schenectady-Troy, N.Y.
  18. Cleveland-Akron-Canton
  19. Minneapolis-St. Paul, Minn.
  20. Phoenix
  21. Richmond-Petersburg, Va.
  22. Tampa-St. Petersburg, Fla.
  23. Hartford-New Haven, Conn.
  24. Orlando-Daytona Beach-Melbourne, Fla.
  25. Charleston, S.C.
  26. Mobile-Pensacola, Fla.
  27. Indianapolis
  28. Flint-Saginaw-Bay City, Mich.
  29. Bangor, Maine
  30. Philadelphia
  31. West Palm Beach-Ft. Pierce, Fla.
  32. Columbus, Ohio
  33. Lansing, Mich.
  34. Knoxville, Tenn.
  35. Ft. Wayne, Ind.
  36. Tulsa, Okla.
  37. Baltimore, Md.
  38. Greensboro-High Pt.-Winston-Salem, N.C.
  39. Burlington, Vt.-Plattsburgh, N.Y.
  40. Portland-Auburn, Ore.
  41. Buffalo, N.Y.
  42. Shreveport, La.
  43. New Orleans
  44. LaFayette, La.
  45. Cincinnati, Ohio
  46. Myrtle Beach-Florence, S.C.
  47. Birmingham, Ala.
  48. Austin, Texas
  49. Kansas City, Mo.
  50. Macon, Ga.

Typically, the summer months are the busiest for mosquito activity, according to Orkin, but mosquito season can start as early as March in the southern U.S. when temperatures warm up.

Mary Jo DiLonardo Mary Jo writes about everything from health to parenting — and anything that helps explain why her dog does what he does.