Key takeaways
- Atlantic hurricane season runs June 1 to November 30 and peaks around September 10, right in the middle of South Florida's rainy season.
- High winds generally kill adult mosquitoes, but their eggs survive and hatch when storms flood the ground and fill containers.
- The CDC says virus-carrying mosquitoes may increase about 2 weeks after a hurricane, so weekly container checks matter most after the storm passes.
- Before a storm, store or flip anything that holds water; it protects your windows from debris and your yard from mosquitoes.
- During outages, keep screens intact and doors closed, including garage doors, as the CDC recommends.
In this article
- Why Hurricane Season and Mosquito Season Overlap
- Before the Storm: Mosquito-Proof Your Yard
- During the Storm and Power Outages
- The First Week After: Clean Up Without the Bites
- Two to Four Weeks After: When Disease Risk Can Rise
- Fix Drainage, Leaks and Landscaping
- Professional and County Mosquito Control After a Storm
- Frequently Asked Questions
Mosquito control during hurricane season comes down to timing. Before a storm, clear away everything that can hold water; during the storm, keep mosquitoes out of the house; and for the weeks after it passes, drain and scrub containers every week, because that is when the mosquitoes that carry disease can multiply.
In South Florida, hurricane season and peak mosquito season are the same months. Every tropical system adds rain to an already wet summer, floods low ground where mosquito eggs wait and leaves behind debris that holds water for weeks. This guide walks you through a practical plan for each stage, so storm prep and mosquito prevention happen together instead of one getting forgotten.
Why Hurricane Season and Mosquito Season Overlap
The Atlantic hurricane season officially runs from June 1 through November 30. According to NOAA, the climatological peak is September 10, with a secondary peak in mid-October that mainly affects the Caribbean and the Gulf.
active peak
Source: NOAA NESDIS
Those months fall inside South Florida’s rainy season, roughly May through October, when heat and frequent downpours already keep mosquito numbers high. Storms add three things mosquitoes need:
- Flooding that hatches floodwater mosquito eggs laid on moist ground months or years earlier
- Debris and damaged property that create thousands of new water-holding pockets
- Disrupted routines: people spend long hours outside cleaning up, often with damaged screens and no air conditioning
The good news, according to the CDC, is that adult mosquitoes generally do not survive a hurricane’s high winds. The bad news is that their eggs do. To understand the floodwater side of the problem in depth, read floodwaters and mosquito risks.
Before the Storm: Mosquito-Proof Your Yard
Much of your hurricane prep already doubles as mosquito control. Loose items that could become projectiles are the same items that fill with rain.
| Prep task | Storm benefit | Mosquito benefit |
|---|---|---|
| Bring in or flip buckets, toys, pots and trash can lids | Fewer flying objects | No rain-filled containers afterward |
| Clean gutters and downspouts | Prevents roof and fascia water damage | Clogged gutters hold water mosquitoes breed in |
| Trim dead branches and dense shrubs | Less wind damage | Fewer shady resting spots for adults |
| Tighten or store tarps and covers | Less tearing in wind | Taut tarps shed water instead of pooling it |
| Inspect window, door and patio screens | Find weak spots early | Keeps mosquitoes out during outages |
| Stock repellent and long clothing | Ready for cleanup | Protection when bites spike |
| Check pool chlorine and pump | Pool stays clean longer | A stagnant pool breeds mosquitoes |
Florida’s general hurricane prep advice also applies to pests beyond mosquitoes; our tips to keep your home safe from pests during hurricane season cover rodents, ants and more.
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During the Storm and Power Outages
When the power goes out, the house gets hot and windows open. That is when mosquitoes get in. The CDC recommends installing, repairing and using window and door screens, not propping doors open (including garage doors) and using air conditioning when possible.
Practical steps for outage days:
- Only open windows that have intact screens.
- Patch small screen tears temporarily until you can replace them.
- Keep the garage door down, even while you move supplies in and out.
- Use bed netting for sleeping areas if screens are damaged; UF/IFAS lists bed netting and fans on high as useful personal protection.
- Keep repellent near the door so you apply it before stepping outside.
Damaged doors and broken windows also let in cockroaches looking for shelter from the water. See how hurricane season invites cockroaches if you start seeing roaches indoors after a storm.
The First Week After: Clean Up Without the Bites
Floodwater mosquitoes can show up in swarms within days. The CDC describes them as aggressive biters that do not spread germs to people, but they make cleanup miserable, and people doing cleanup are more likely to be bitten.
Protect yourself while you work:
- Apply an EPA-registered repellent with 10-30% DEET, picaridin, oil of lemon eucalyptus or IR3535, the ingredients the Florida Department of Health considers most effective.
- Wear long sleeves, long pants, socks and shoes.
- Consider permethrin-treated clothing, which the CDC suggests for storm cleanup.
- Start draining containers right away, and keep a weekly routine.
The Florida Department of Health adds that heavy rain and flooding raise the risk of mosquito-borne disease, especially in warm, humid weather, and that pregnant women should take extra precautions after a storm and talk with their health care provider.
Two to Four Weeks After: When Disease Risk Can Rise
This is the stage most people miss, because the storm feels over. The CDC explains that mosquitoes able to spread viruses may increase about 2 weeks after a hurricane, including in areas that did not flood but got more rain than usual. Spread to people may take several more weeks, and the risk is higher if dengue or West Nile virus was already circulating.
The Asian tiger mosquito and Aedes aegypti are the usual culprits. They breed in small containers, bite in the daytime and stay within a few blocks of where they hatched. Every bucket, tire, sagging tarp and debris pile in your yard counts. The CDC’s advice is simple: once a week, empty and scrub, turn over, cover or throw out anything that holds water, including tires, tarps, buckets, toys, pools, birdbaths, flowerpot saucers and trash containers.
Not sure where water hides after a storm? Our list of 10 hidden places mosquitoes breed is a good checklist for this stage.
Fix Drainage, Leaks and Landscaping
Once the immediate cleanup is done, fix the problems that keep making new standing water:
- Gutters and drains. Storms pack them with leaves and shingle grit. Clear them so rain flows away from the house.
- Low spots in the yard. Miami-Dade suggests filling lawn holes, tree holes and the area under air conditioner drains with sand.
- Broken irrigation and leaking pipes. Repair them before they create permanent puddles.
- Fallen palm fronds, boats and debris. UF/IFAS notes that fallen palm fronds can hold water on the ground, and advises checking tarps on boats and equipment and pumping out bilges.
- Bromeliads, ponds and fountains. Flush or refresh them, or use a Bti larvicide according to the label where water must remain.
- Overgrown shrubs. Trim them so adult mosquitoes have fewer shady, humid places to rest.
Professional and County Mosquito Control After a Storm
County programs handle the big picture. Miami-Dade Mosquito Control runs more than 160 traps countywide, treats breeding sites and performs truck and, when necessary, aerial spraying. You can report a mosquito problem through 311, and inspectors check your property and neighboring areas. UF/IFAS notes that large floodwater areas are beyond what homeowners can treat, which is why agencies take them on.
Your own property is where a private service helps. Toro’s mosquito control service begins with a free inspection to find where mosquitoes breed and hide on your property. Technicians treat breeding sites with larvicide granules and growth regulators, apply a plant-oil barrier treatment to the shrubs and plants where adults rest, and point out the containers, gutters and plants that hold water. You can book a one-time treatment or a 3-month plan of 4 treatments, one every 3 weeks; if weather gets in the way, a treatment can be moved up. With a guaranteed response within 24 hours, Toro can help quickly once it is safe to work outdoors.
Hurricane season ends November 30, but mosquitoes in South Florida do not stop there. Read why mosquito season is longer than you think in Florida.
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305-594-4767Frequently Asked Questions
Do hurricanes kill mosquitoes?
Does the county spray for mosquitoes after a hurricane?
What repellent should I use during hurricane cleanup?
Are mosquitoes after a hurricane more likely to carry disease?
How do I keep mosquitoes out when the power is out?
Sources
- Earth from Orbit: Atlantic Hurricane Season Hits Its Peak, NOAA National Environmental Satellite, Data, and Information Service
- What to Do After a Hurricane or Flood, Centers for Disease Control and Prevention
- FDOH Urges Floridians to Drain and Cover to Prevent Mosquito Bites, Florida Department of Health
- Mosquitoes & Their Control: Integrated Pest Management for Mosquito Reduction Around Homes and Neighborhoods, UF/IFAS Florida Medical Entomology Laboratory
- Mosquito Control Fact Sheet, Miami-Dade County Mosquito Control
- Mosquito Tips and Resources, Miami-Dade County Mosquito Control
Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.
