Connecticut Climate Impacts and Costs

Connecticut is experiencing accelerating climate risks, including more frequent extreme precipitation, rising sea levels, and increasing temperatures. The report details specific historical damages, such as a $300 million storm in August 2024 and $21 million in agricultural losses in July 2023. It projects significant future costs, including $5.3 billion for seawalls by 2040 and a 400% increase in days over 90 in Connecticut by 2050. The document provides comprehensive lists of potential adaptation costs across infrastructure, public health, and individual expenses to mitigate these hazards.

• Extreme precipitation is increasing in the northeastern United States, with days featuring over 2 inches of rain increasing by 50% and days with over 5 inches increasing by over 100% since the 1950s.
• A severe storm in August 2024 caused an estimated $300 million in damages in Connecticut, destroying 19 homes and 80 businesses, while a July 2023 rainfall event caused $21 million in losses to the state's $4 billion agricultural industry.
• Sea levels in Connecticut have risen by approximately 10-12 inches per century, exceeding the global average of 6-8 inches. Projections suggest a further rise of 1 to 8 feet by 2100, potentially resulting in the loss of 24,000 acres of land over the next 50 years.
• Coastal protection costs are projected to be high, with an estimated $5.3 billion required to build 394 miles of seawalls to protect infrastructure, homes, and buildings by 2040.
• The lobster industry in Connecticut saw a dramatic decline due to climate factors; annual production dropped from 3.7 million pounds ($12 million revenue) in 1990 to approximately 127,000 pounds ($600,000 revenue) by 2014.
• Connecticut's temperature has risen about 3.5 since the start of the 20th century. By 2050, the number of days over 90 is expected to increase by 400% (to 25 days per year), and heat wave days are projected to increase by 1,100% (from 4 to 48 per year).
• Extreme heat has already caused tangible costs and health impacts, including a death from heat illness in June 2025 and $35 million in new cooling costs for public schools between 1970 and 2025.
• Droughts in Connecticut increase the risk of water-borne illnesses by concentrating bacteria and viruses in drinking water. Additionally, a single brush fire in Berlin, CT, in late 2024 cost between $1 million and $5 million to contain.

APA

Center for Climate Integrity (2026). Connecticut Climate Impacts and Costs. https://climateintegrity.org/uploads/media/CCI_Connecticut_Impacts_Costs_2026.pdf

Chicago

Center for Climate Integrity. Connecticut Climate Impacts and Costs. 2026. https://climateintegrity.org/uploads/media/CCI_Connecticut_Impacts_Costs_2026.pdf.

Wikipedia

{{cite report |author=Center for Climate Integrity |title=Connecticut Climate Impacts and Costs |date=2026 |url=https://climateintegrity.org/uploads/media/CCI_Connecticut_Impacts_Costs_2026.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{centerforclimateintegrity2026connecticut, author = {{Center for Climate Integrity}}, title = {{Connecticut Climate Impacts and Costs}}, institution = {Center for Climate Integrity}, year = {2026}, url = {https://climateintegrity.org/uploads/media/CCI_Connecticut_Impacts_Costs_2026.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }