Search Climate Insights Directory

The report projects that Iowa will face significantly hotter summers, increased flooding in winter and spring, and new threats to agriculture due to climate change. Under a higher-emissions scenario, Des Moines could see over 85 days per summer above 90°F and frequent heat waves similar to the 1995 Chicago disaster. Agriculture is threatened by heat stress for corn and livestock, as well as the northward expansion of pests like the corn earworm. The document argues that Iowa can mitigate these risks by strengthening its renewable electricity standard, promoting energy efficiency, and banning coal plants without carbon capture and storage, supported by federal cap-and-trade and fuel economy standards.

The report projects that Michigan will face significantly hotter summers, increased flooding, and agricultural disruptions by the end of the century, particularly under a higher-emissions scenario. It highlights risks to public health from extreme heat and ozone pollution, as well as threats to the state's dairy and corn industries. To mitigate these effects, the document advocates for strengthening renewable energy standards, updating building codes, and implementing federal cap-and-trade and fuel economy policies.

The document describes the use of IPCC emissions scenarios (A1fi and B1) and three global climate models (GFDL CM2.1, HadCM3, and PCM) to project climate variables in the U.S. Midwest. It details the distinction between higher-emissions paths, leading to 940 ppm of CO2 by 2100, and lower-emissions paths, leading to 550 ppm. The briefing notes that while these models reproduce historical regional climate features, they may be conservative as they do not capture recent rapid winter warming in the Midwest or the accelerated melting of polar ice sheets.