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Monthly Attribution Overview – July 2026
In July 2026, the United States experienced widespread above-average temperatures, with an average anomaly of 1.5°F across 192 cities. The Northern Rockies and Plains were the warmest region, exceeding normals by more than 4.0°F. Long-term data indicates that 185 of the 192 analyzed cities have warmed since 1970, with Reno, Nevada, showing the most significant increase. Climate attribution analysis using the Climate Shift Index (CSI) showed that San Juan, Puerto Rico, had 31 days where temperatures were at least two times more likely due to climate change.
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Document type: Report
Monthly Attribution Overview – June 2026
In June 2026, the United States experienced slightly above-average temperatures, with an average anomaly of 0.7°F across 192 analyzed cities. The Southwest was the warmest region, with temperatures more than 2.9°F above normal, and Flagstaff, Arizona, recorded the most unusual warmth at 4.0°F above normal. Long-term trends show that 189 of the 192 cities have warmed since 1970, with Reno, Nevada, seeing the greatest increase of 10.6°F. Climate attribution analysis using the Climate Shift Index (CSI) indicates that San Juan, Puerto Rico, had 30 days where temperatures were at least two times more likely due to climate change.
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Document type: Report
Quem mais precisa menos acessa: recomendações para um Pronaf inclusivo e sustentável
The report finds that Pronaf exhibits a regressive distribution of credit, where the most capitalized producers receive the bulk of resources while the most vulnerable are excluded. It highlights that 79% of family farmers did not access Pronaf credit in 2024/25, and resources are heavily concentrated in the South and Southeast regions and in conventional crops like soy, corn, and coffee. The document argues that lines for bioeconomy and agroecology remain marginal, often representing less than 1% of total credit. It emphasizes the critical but underfunded role of Technical Assistance and Rural Extension (ATER), which received less than 0.3% of the total family agriculture budget in the 2025/26 Plan Safra. To address these failures, the report recommends establishing minimum allocation targets for smallholders and the North/Northeast regions, updating outdated fiscal modules for eligibility, integrating the Brazilian Sustainable Taxonomy, and blocking subsidized credit for properties with recent deforestation.
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Document type: Report
From the 2026 session to what’s next: Expanding our work in Virginia
The Clean Air Task Force (CATF) reports on the 2026 Virginia legislative session, highlighting progress in diversifying the electricity portfolio, modernizing procurement, and improving infrastructure siting. Key achievements include the state's planned reentry into the Regional Greenhouse Gas Initiative (RGGI) by July 1, 2026, and the creation of a Chief Energy Officer position. CATF argues that while these targeted improvements are constructive, Virginia must further modernize its Clean Economy Act (VCEA) to better integrate clean firm resources and manage rising electricity demand from data centers and manufacturing.
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Document type: Statement
Closing the Rural Credit Divide: Pathways to Increase PRONAF Access for Smallholders
The research identifies significant regional and gender disparities in access to PRONAF credit in Brazil, finding that technical assistance (ATER) and cooperative membership are critical determinants of access. While the 2025/26 Agricultural Plan allocated R$ 78.2 billion to PRONAF, a previous study indicated that approximately 85% of smallholders lack credit access. Simulations show that expanding ATER would most effectively increase access in the North and Northeast, while strengthening cooperatives would be most impactful in the Southeast and Midwest. The report warns that declining federal investments in ATER—dropping to approximately R$ 26.48 million by October 2025—compromise the program's ability to build climate resilience among vulnerable smallholders.
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Document type: Research paper
Warmer Growing Season, Longer Allergy Season
Analysis of USA National Phenology Network data shows that first spring leaves now emerge earlier in 88% of 242 major U.S. cities, shifting by an average of six days since 1981. This trend, combined with a freeze-free growing season that has stretched 21 days longer on average across 173 cities between 1970 and 2025, extends allergy seasons and increases the risk of 'false spring' crop losses. Ecological disruptions include potential mismatches between bird migration and the peak abundance of food sources.
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Document type: Fact sheet
Quem Fica de Fora do Pronaf?
The report analyzes inequalities in access to Pronaf credit among Brazilian family farmers, identifying technical assistance (ATER) and cooperatives as key drivers of access. It highlights a stark regional divide, with the South region having significantly higher access than the North and Northeast. The study argues that credit alone is insufficient for climate adaptation and calls for increased investment in ATER, which has seen a downward trend in federal spending, to ensure a just and sustainable agricultural transition.
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Document type: Report
The Poorest Renters, the Sharpest Increases: Examining the Rent Crisis in Workforce Housing
Between 2021 and 2025, rents in the United States' workforce housing sector—the lowest-rent market-rate housing—increased by over 20%, more than double the 9.2% increase seen in 'discretionary' housing. The report finds that in most of the 94 analyzed markets, rent increases for low-income tenants outpaced those for high-income tenants, with the most significant regional increases occurring in Florida (26.8%), the Northeast (25.3%), and the Pacific Northwest (23.2%). The analysis suggests that investor landlords, including private equity firms, target this sector as a reliable profit source due to high demand and a captive renter class. The report warns that these increases are likely to drive higher rates of eviction and self-eviction and calls for policy interventions such as price controls and eviction protections.
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Document type: Report
Monthly Attribution Overview – September 2025
The analysis shows that 161 of 192 analyzed U.S. cities experienced hotter-than-average temperatures in September 2025, with an average anomaly of 1.5°F. The Northwest region saw the most unusual heat, averaging 3.42°F above normal, while Spokane, WA, recorded the highest individual city anomaly at 7.8°F. Long-term trends indicate widespread warming since 1970, with Reno, NV, showing the fastest increase at 10.8°F. Climate Shift Index (CSI) data highlighted strong climate change influence in several cities, most notably San Juan, PR, which had 22 days at CSI 5.
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Document type: Report
THE POOREST RENTERS, THE SHARPEST INCREASES
The report finds that rents for the lowest-cost unsubsidized market-rate housing (workforce housing) increased by 20.2% nationally between 2021 and 2025, more than double the 9.2% increase for luxury (discretionary) housing. This trend is most pronounced in the Sunbelt region, where corporate landlords, including private equity firms, target workforce housing as a low-risk, high-cash-flow investment. The document highlights a crisis of evictions and 'self-evictions' driven by these price hikes and argues that government-sponsored enterprises (GSEs) like Fannie Mae and Freddie Mac facilitate this corporate takeover by providing easy financing with few tenant protections. It recommends policy interventions such as rent control, just cause eviction laws, and the adoption of investment standards for public pension funds.
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Document type: Report
Thunderstorm Straight-Line Winds
Severe storms in the U.S. have become significantly more costly, with billion-dollar events increasing more than five-fold between 2005–2024 compared to 1985–2004. While the overall frequency of severe and tornadic thunderstorms has not changed significantly since 1979, tornado activity is concentrating into more frequent and extreme outbreaks, and 'Tornado Alley' has shifted eastward. Projections suggest a 5-20% increase in conditions favorable to severe thunderstorms per 1.8°F of warming, with one study projecting a 6.6% increase in supercell frequency by the end of the century.
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Document type: Fact sheet
Lower Bills, Cleaner Air: Heat Pump Benefits for Homes Relying on Delivered Fuels
Over 10 million US homes still rely on delivered fuels like oil and propane, which are expensive and polluting. Transitioning these households to air-source heat pumps (ASHPs) and heat pump water heaters (HPWHs) could save US customers nearly $8 billion annually in energy bills and significantly reduce carbon and air pollution. The document advocates for state-level policy changes, such as allowing fuel switching in utility energy efficiency programs and implementing clean heat standards, alongside targeted outreach and contractor training to support rural and low-income households.
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Document type: Briefing
Monthly Attribution Overview - April 2025
In April 2025, 182 out of 191 analyzed U.S. cities were warmer than normal, with an average temperature anomaly of 2.1°F. The Southeast region experienced the most significant anomalies and the highest number of days with a Climate Shift Index (CSI) of 2 or above, indicating temperatures at least twice as likely to occur due to climate change. Shreveport, Louisiana, recorded the highest anomaly at 6.33°F, while Reno, Nevada, showed the fastest long-term April warming since 1970, increasing by 8.0°F.
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Document type: Report
Longer Growing Season, Longer Allergy Season in 172 U.S. Cities
Climate Central's analysis of 198 U.S. cities shows that 87% have experienced longer freeze-free growing seasons since 1970, increasing by an average of 20 days. This trend, driven by carbon pollution and warming, extends the period plants release pollen, worsening seasonal allergies for millions, including approximately 19% of U.S. children. The report highlights that CO2 levels also boost pollen production, potentially increasing it by 200% by the end of the century, with disproportionate health impacts on Black and Puerto Rican children who face higher asthma risks.
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Document type: Report
2025 Spring Package
Climate Central's analysis of 241 U.S. cities shows that 97% experienced an increase in average spring temperatures between 1970 and 2024, with an average rise of 2.4°F. The Southwest saw the most significant warming, and 80% of analyzed locations now experience at least one additional week of warmer-than-normal spring days. These trends are linked to global warming and contribute to increased wildfire risk, prolonged allergy seasons, and stressed water supplies in the western U.S.
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Document type: Fact sheet
How “Power Couples” Can Help the United States Win the Global AI Race
RMI introduces the "Power Couples" model, which pairs large electricity consumers, such as AI data centers, with new-build wind, solar, and battery resources located near existing generators with approved grid interconnections. This approach aims to bypass long grid access wait times—which can reach five years for generation and eight years for transmission—while ensuring that the costs of new demand are borne by the users rather than general ratepayers. RMI's analysis indicates that this strategy could satisfy over 50 GW of new load at an average of 88% carbon-free energy, with significant opportunities concentrated in the PJM, ERCOT, and Southeast regions.
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Document type: Report
Fastest-Warming Seasons
Climate Central analyzed 245 U.S. locations and found that winter is the fastest-warming season for 76% of these sites, particularly in the Northeast, Southeast, and Ohio Valley. In the western U.S., fall and spring were the fastest-warming seasons for 31 locations, while some West and Northwest areas experienced the most rapid summer warming. These trends contribute to disrupted snowfall, earlier snowmelt, increased wildfire intensity, and longer pest and allergy seasons.
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Document type: Fact sheet
Solar met 61% of US electricity demand growth in 2025
In 2025, US solar generation increased by 83 TWh, meeting 61% of the 135 TWh rise in electricity demand. This growth was most concentrated in regions with the highest demand increases, such as Texas and the Midwest. While utility-scale solar capacity additions fell by 6% due to tariff uncertainties and grid connection delays, battery capacity surged by 133% to 26 GW, enabling solar to meet some evening demand and reducing curtailment pressure, particularly in California.
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Document type: Report
Monthly Attribution Overview - September 2024
The report finds that September 2024 was unusually warm across much of the U.S., with 171 of 191 analyzed cities experiencing warmer-than-normal temperatures. While the highest temperature anomalies occurred in the Midwest and northern Great Plains, the strongest climate change signals (CSI values) were concentrated in the Southwest and Florida.
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Document type: Report
Following the Money
Between 2021 and 2023, bioeconomy finance in Brazil averaged US$ 3.213 billion per year, heavily concentrated in the planted forest and bioenergy sectors. While domestic private sources provided 69% of the funding, biodiversity products and native forests remain significantly underfunded, with the Northern region receiving only 12% of biodiversity-related finance.
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Document type: Report