If your yard has been worse than usual the last few weeks, it is not your imagination. South Florida mosquito season runs hottest from July through September, and this year that stretch is overlapping with active dengue alerts in two of our closest counties. Late summer is when the two problems, heavy rain and disease-carrying mosquitoes, stack on top of each other.
What is actually going on right now
On August 3, 2026, the Florida Department of Health in Miami-Dade issued a mosquito-borne illness alert after a confirmed locally-acquired case of dengue, transmitted by the Aedes aegypti mosquito (Source: Florida Department of Health in Miami-Dade County, floridahealth.gov, Aug 3, 2026). The same day, DOH-Palm Beach issued its own advisory in response to a confirmed human case of locally-acquired dengue fever (Source: Florida Department of Health in Palm Beach County, floridahealth.gov, Aug 3, 2026). Both counties confirmed one locally-acquired case each. That is a different, more serious category than a travel-associated case, where someone picks up the virus abroad and it never spreads locally. These are homegrown infections, which means the mosquito population in those counties is actively carrying it.
On September 4, 2026, the Florida Surgeon General went statewide with the warning, citing Hillsborough County's dengue count at 59 locally-acquired infections and asking Floridians to walk their own property before the holiday weekend and dump anything holding water (Source: Florida Department of Health, floridahealth.gov, Sept 4, 2026). Hillsborough is on the west coast, outside our county. The state-level push is a signal that this is a statewide season, one that includes Miami-Dade and Palm Beach on the confirmed list.
I have not seen a fetched, dated source naming Broward County as under an active alert or advisory as of this week, so I'm not going to claim one. What I can tell you is Broward sits between two counties that do have confirmed locally-acquired cases, and mosquitoes do not check county lines.
Why the rain makes it worse, not just uncomfortable
This is the part that matters more than any single case count. After a heavy rain event, you typically see a noticeable jump in adult mosquito activity 7 to 10 days later. That lag is the incubation window: eggs that were sitting dry in a gutter, a bucket, a tarp fold, or a bromeliad cup hatch once they're flooded, and the whole cycle from egg to biting adult takes about that long in South Florida heat. August and September get the worst of it because it is both the wettest stretch of the year and the peak of hurricane season, so you get repeat flooding events instead of one storm and done.
That means a single sweep of your yard is not enough right now. If it rains hard on a Tuesday, you should expect the bite pressure to spike again the following weekend, whether or not anything in your yard looks obviously wet by then.
What actually helps, and what does not
Dumping standing water is still the single best thing a homeowner can do for free. Gutters, plant saucers, kids' toys, tarps, anything that holds even a bottle cap of water is a potential breeding site. Do it after every rain, not once a season.
Repellent and long sleeves help you personally but do nothing about the population breeding in your yard, which is what keeps biting your kids and pets after you go inside.
Professional treatment is where the two products get confused, and it is worth being precise about it. A barrier spray treatment kills adult mosquitoes on contact and on treated foliage, with residual protection generally running 10 to 17 days depending on rain and vegetation growth, it is not a natural product and it is not marketed as one. Separately, In2Care-style stations use a natural, biological larvicide to target breeding sites before mosquitoes ever become biting adults. They do different jobs. A yard that gets hit by repeat rain all season benefits from both. Barrier spray buys you weeks, and larvicide stations keep working on the eggs you cannot see.
Bottom line for this week
Two of our neighboring counties have confirmed, locally-acquired dengue cases on the books right now, not travel cases, not projections. Whether or not Broward gets its own alert, the storm pattern that drives mosquito booms does not care about county borders. Walk your yard after every rain for the next several weeks. If you already have a professional service in place, this is not the month to let it lapse.
Sources are cited inline. Questions about your own property? Call 561-443-3333 or request a free quote.