Clouds form on the horizon at Nachusa Grasslands.
Nachusa Grasslands Clouds Clear Creek Knolls at Nachusa Grasslands at sunrise. © Charles Larry

Stories in Illinois

Tackling Climate Change in Illinois

We're working for a future where people and nature thrive together.

The Nature Conservancy is working from global to local levels to tackle one of the biggest challenges of our time—climate change. In Illinois, our own actions can have an important impact on motivating climate action, reducing emissions and building resilience.

We are excited to collaborate with new and existing partners to move this work forward at the pace and scale necessary to accelerate ambition and efforts to meet shared climate change goals.

Climate Assessment Highlights

Expore the highlights of each section of the climate assessment:

New Statewide Climate Assessment Released

The Illinois chapter recently released a first-of-its-kind, state-wide climate assessment. The report brought together the expertise of more than 40 scientists and technical experts to explain the most up-to-date information on how climate change is expected to affect Illinois. The writing was co-led by two members of TNC Illinois’ Science Advisory Committee, Dr. Don Wuebbles and Dr. Jim Angel, climate experts with years of expertise in atmospheric science. From TNC, Karen Petersen, the chapter’s climate change project manager, and Maria Lemke, director of conservation science, also played active roles in developing the report. Beyond providing a general overview of anticipated changes, the assessment explores predicted effects on hydrology, agriculture, human health and native ecosystems. These topics were selected because these sectors touch on many aspects of people’s lives and well-being.

The sun rises over an Illinois farm field.
Download the full report Illinois' Climate Assessment © Tim Lindenbaum

Illinois' Climate Assessment

Download the full report and learn more about the impacts of climate change in the Prairie State.

You can also watch a webinar recording that provides an overview of the assessment.


Our Advocacy in Action

Illinois’ environment, public health and economy depend on strong climate and clean energy leadership at all levels of our government. And as our state grapples with the COVID-19 pandemic, families and businesses need a bold recovery effort to build a strong, equitable economy and healthier, more resilient communities.

Storm clouds gather above a farm field.
Climate Change Climate change will bring more intense storms. © Tim Lindenbaum
The full moon rises above windmills.
Rising temperatures Nightime temperatures are rising in Illinois. © Tim Lindenbaum
The sun rises over a wetland.
Climate Change Climate changes will increase temperatures. © Tim Lindenbaum
Storm clouds gather above a farm field.
Climate Change Climate change will bring more intense storms. © Tim Lindenbaum


Over the past century, the number of days in Illinois with at least 2 inches of rain has increased by 40%.

The full moon rises above windmills.
Rising temperatures Nightime temperatures are rising in Illinois. © Tim Lindenbaum


Over the past century, nighttime temperatures in Illinois have risen about 2°F — three times the rate of daytime warming.

The sun rises over a wetland.
Climate Change Climate changes will increase temperatures. © Tim Lindenbaum

8 to 40 days

By mid-century, Illinois could experience 8-40 additional very hot days (95°F and above), depending on the level of greenhouse gas emissions.

Tackling Climate Change Locally

The Illinois Chapter is collaborating with partners on four pathways to tackle the issue of climate change in Illinois and beyond.


Mobilizing Climate Action in Rural Illinois

TNC is working across all 50 states to activate support for durable, bipartisan climate legislation at state and federal levels. In Illinois, we are actively engaging key federal congressional members, members of the Illinois state legislature, state agencies, and the Illinois Governor's office to open up dialogue on ambitious climate solutions and science-based climate policy. We are also taking steps to garner support for climate action with new constituencies, especially with our partners in rural Illinois.


Reducing Emissions with Natural Climate Solutions

Efforts to restore, protect, and sustainably manage natural areas is a critical component of limiting global warming to well below the 2°C threshold set by the Paris Agreement. In Illinois, the biggest, low-cost opportunities for employing natural climate solutions exist in the agricultural sector, using practices that some farmers are already employing to improve soil health, yields, and water quality. TNC sees a large opportunity to increase uptake of these agricultural best management practices through partnerships, capacity building and sensible climate change policy.


Promoting Low-impact Renewable Energy Deployment

Meeting climate change goals requires the rapid and large-scale deployment of renewable energy, which will invariably have impacts on the land. There are many steps we can take and many upsides to siting new renewable energy development in areas with the fewest adverse impacts to habitat, wildlife, and ecosystem services. TNC has developed useful tools and resources to guide decisions around low-impact siting, such as Site Wind Right. This interactive online map can help to inform turbine siting decisions across the Central United States. In the Illinois Chapter, we are working to increase the use of these tools and to promote the adoption of renewable energy siting guidance into relevant policies and plans.


Minimizing Flood Risk in Rural and Urban Communities

As local average temperatures and extreme weather events increase the frequency and magnitude of flooding and droughts, nature can be used as an important, cost-effective tool to enhance resiliency, helping human and natural systems adapt to the impacts of climate change. In rural areas, landscape approaches to land use planning can help to identify priority areas for floodplain restoration and reconnection—an excellent way to increase flood storage and decrease the flood risk to infrastructure and communities. In towns and cities, natural infrastructure in the form of bioswales, rain gardens, and tree planting, is a low-cost and effective approach for tackling issues like localized flooding, urban heat islands, and poor air quality. TNC would like to expand its work on climate adaptation in Illinois, to improve our reach in more communities across the state.

How We’re Tackling Climate Change Globally

  • Seedlings grow at a large, state-owned, tree nursery near the city of Guarapuava, Parana state, Brazil.

    Nature Based Solutions

    Our reThink Soil program believes that investing in sustainable soil health practices can increase agricultural yields, generate more profit for farmers and reduce negative environmental impacts. Learn about reThink Soil.

  • Laura Crane and a Fuller Star employee walking through the array of solar panels at the Fuller Star plant in Lancaster, California.

    Promoting Clean Energy

    We're working with local governments and business to achieve the 2025 goal of 25% renewable energy. TNC's created Site Wind Right, which reveals those areas in the Central U.S. where wind energy development would not disrupt important wildlife. Learn more about Site Wind Right.

  • Bridge

    Corporate Engagement

    We're utilizing lessons learned through the CEO Climate Dialogue and are developing relationships with organizations across sectors to discuss their climate actions, how they are implementing sustainability plans and how to leverage federal action. Learn more about the CEO Climate Dialogue.

  • The Nature Conservancy's deforestation initiatives in East Kalimantan, Indonesia.

    Working with Governments

    We work with government leaders around the world to set aggressive goals for climate solutions that create jobs, protect people and cut pollution. Learn how we impact policy.

  • Nealla Frederick, TNC's Eastern Caribbean Conservation Planner, holds a young red mangrove shoot during a mangrove restoration project.

    Building Resilience

    We're helping to not only reducing causes of climate change, but preparing our communities and natural resources to better adapt to climate change impacts. Learn about building coastal resilience.