Hurricane Ian was one of the deadliest and most devastating storms to strike the state of Florida. Ian made landfall in Cayo Costa, Florida as a Category 4 hurricane on September 28th, 2022, bringing extreme winds, heavy rainfall, and record storm surges to Southwest Florida. Impacts from Ian were widespread throughout western Cuba and the southeastern United States.
Reached out to check on safety of partners and offer support.
Coordinated with University of Florida-Center for Coastal Solutions (UF CCS) to bring in additional personnel to help with post-Ian water quality sampling efforts.
Created spreadsheet to coordinate sampling efforts between multiple partners and stakeholders.
Staff collected samples in Lemon Bay and Charlotte Harbor to gather information on pollution levels and the impacts that Hurricane Ian is having on water quality.
Water samples were also collected for lab analysis.
Staff participated in weekly meetings with partners to coordinate sampling efforts.
Lined up external partners to underwrite portions of the sampling costs.
Funded ongoing sampling as well as post-Ian sampling efforts directly.
Staff collected samples in the Caloosahatchee, Matlacha Pass, and Pine Island Sound.
Funded online dashboard where partner sampling results are compiled.
Week Four and Beyond
CHNEP continues to participate in weekly calls to discuss sampling results and findings with all partners involved.
Working with partners to conduct preliminary analysis on data.
Coordinating efforts for future disaster response plans.
Impacts on CHNEP's Estuaries and Rivers
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Dona & Roberts Bay Basin
The Dona and Roberts Bays connects one of the five major watersheds in Sarasota County to the Gulf of Mexico via the Venice Inlet. Significant features within this basin include Dona Bay, Roberts Bay, Cow Pen Slough, and the Pinelands Reserve and Heritage Ranch Gopher Tortoise Preserve. This basin was historically altered in the 1960s and 1970s through the channelization of Cow Pen Slough which dramatically increased the size of the basin, and increased volumes of freshwater to the downstream estuaries.
The heavy storm surge was estimated around 6-12 ft, worsened by hours of pounding rainfall across the State of Florida, leading to deep inland flooding.
Dona and Roberts Bays received 6-15 inches of rainfall from Hurricane Ian, combined with 80-100 mph winds.
Roberts Bay on Sept. 28. Photo: Pedro Portal/El Nuevo Herald/Tribune News Service via Getty Images
The Regional Post-Ian Water Quality Sampling Effort includes Charlotte County; Florida Government; Lee County Government; University of Florida Center for Coastal Solutions (UF CCS); Southwest Florida Water Management District (SWFWMD); South Florida Water Management District (SFWMD); Environmental Science Associates (ESA); Florida Department of Environmental Protection (FDEP); Florida Fish and Wildlife Conservation Commission (FWC); Sanibel-Captiva Conservation Foundation (SCCF); Sarasota Bay Estuary Program (SBEP); Florida Gulf Coast University (FGCU); University of South Florida (USF); Florida Sea Grant Charlotte County; National Oceanic and Atmospheric Administration (NOAA); and more!
Hurricane Ian Overview
Storm Track and Timeline
9/23 - Tropical Depression Nine forms.
9/24 - Upgraded to Tropical Storm Ian with sustained winds > 40 mph.
9/26 - Upgraded to Hurricane Ian with sustained winds of 75 mph.
9/27 - Ian becomes Major Cat 3 Hurricane.
9/28 - Upgraded to Cat 4 Hurricane with max sustained winds of 155 mph.
9/28 - Major Hurricane Ian makes landfall near Cayo Costa, Florida.
9/28 - Second landfall near Punta Gorda, Florida.
9/29 - Downgraded to Tropical Storm with sustained winds of 65 mph near Orlando, FL.
Florida Division of Emergency Management - Debris Cleanup Hotline:
Call (850) 961-2002 or email IanDebrisCleanup@cdrmaguire.com
Rainfall, Wind, and Surge
Recorded Precipitation by County
Myakka City: 15.87 in
North Port: 27.7 in
Venice: 18.16 in
Port Charlotte: 23.0 in
Rotonda: 26.95 in
Lehigh Acres: 14.42 in
Fort Myers: 9.39 in
Sebring: 15.0 in
Arcadia: 12.83 in
Winter Haven: 9.5 in
Lake Wales: 16.99 in
Wauchula: 12.24 in
Bowling Green: 12.24 in
Moore Haven: 3.86 in
The City of Winter Haven received 9.5 inches of rain during Ian. When paired with extreme amounts of rainfall during the months of August and September (13.3 in & 17.4 in, respectively), this resulted in an intense rise in surface levels.
Just after Hurricane Ian, the elevation of the Winter Haven lakes rose to nearly the highest levels recorded since the hurricane season of 2004.
A tornado occurred in Moore Haven in Glades County. It traveled 1.7 miles with a peak wind speed of 85 mph and was rated an EF-0.
Unprecedented inundation and damaging flooding due to storm surge was reported throughout Southwest and Central Florida, including record-breaking high water levels in the Myakka, Peace, and Caloosahatchee Rivers.
Storm surge of up to 18 ft was reported in Lee County. Saltwater flooding due to storm surge left freshwater lakes and ponds with salinity levels too high to support native vegetation and wildlife.
Native pond vegetation including Pickerel Weed, Duck Potato, and Giant Leather Fern are not able to survive at high salinities.
Several local wildlife species are also dependent on freshwater. The native pig frog and southern leopard frog spend most of their time in freshwater. According to SCCF, these frogs still have not been documented as existing post-Ian.
Credit: Sanibel-Captiva Conservation Foundation
Sanibel View Condominiums
The Aftermath of Hurricane Ian
Unprecedented amounts of every type of pollution were discharged down all rivers in Central and Southwest Florida into our bays and the Gulf of Mexico. This includes solid waste and physical debris from cars and boats, as well as chemical, nutrient and bacteria pollution. The path of the hurricane went right up the Peace River Basin into central Florida, through a 1.3 million acre area referred to as "Bone Valley" where Florida's phosphates are mined to make fertilizer. Many areas were without functioning sewer systems and septic tanks failed and overflowed into the streets.
Nutrient pollution in runoff can stimulate or exacerbate harmful algal blooms. By late October, red tide was present at high concentrations, causing respiratory irritation for residents in Charlotte, Lee and Sarasota counties.
Lighthouse Beach Park in Sanibel on October 10, 2022. Photo Credit: SCCF
As flood and stormwater drained from the landscape, salinities in our estuaries and the Gulf were stratified, with fresh to brackish water layered on top of saltwater. High BOD and hypoxic (low oxygen) conditions were present and appeared to persist for several weeks. Fecal coliform, enterococci, and other bacteria levels were alarmingly high and exceeded well above the threshold for impairment.
The subsequent red tide bloom may have been triggered or exacerbated by nutrient plumes associated with the hurricane. All of these factors working together led to mass fish die-offs throughout CHNEP estuaries and even inland lakes.
Problems encountered related to Water Quality included:
Surface water can be impacted by not only by nutrient and contaminant concerns from runoff (gas, oil, pesticides, physical debris) but also elevated bacteria levels from septic and sewer overflows as well as the risk posed by some algae blooms or other natural occurring organisms such as Vibrio being given ideal conditions to proliferate post-storm.
Currently surface water is seen as environmental only, not a public health concern in the way that drinking water may be. Providing information on surface water quality not included in emergency management protocols/practices.
Up to date information on water quality concerns for policy makers and the public as it can also have impacts to human health and post-storm practices.
Potential Next Steps
Need to better integrate water quality monitoring and emergency operations. Educate emergency managers/Policy makers on the impact water quality has to human, ecologic, and economic health after a major storm event and the need to have a coordinate response plan. Educate environmental managers on EOC processes and procedures.
Increase ‘nimbleness’ of response time and identify where and how collected data will be shared.
Climate Change and Future Implications
More available energy from increased ocean temperatures and increased atmospheric moisture will cause winds in the strongest storms to become stronger, meaning wind damages would be greater and storm surge would be larger.
Using the same attribution technique recently peer-reviewed in Nature Communications, preliminary analysis by Prof. Kevin Reed and Michael Wehner shows human-induced climate change increased Ian’s extreme rain rates by over 10%.
More specifically, accumulated precipitation over land during Hurricane Ian increased by 15.3 to 20.7% due to climate change, leaving 500,000 more people flooded.
On the heels of Ian came a record-breaking November Hurricane. Hurricane Nicole was only the third November hurricane to hit Florida, making landfall in Florida on November 10, 2022. Nicole also holds the record for the second-highest surge above sea level.
The shortened recovery time between storms reduces resiliency.