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The EPA is reviewing a petition from Earthjustice and community groups regarding the use of Significant Impact Levels (SILs) for ozone and fine particulate matter (PM2.5) in Louisiana and Texas. While the EPA has rejected the Title VI administrative discrimination portion of the petition due to ongoing litigation, it is conducting a broader national evaluation of SIL guidance through an internal workgroup convened in September 2023, with results expected by the end of 2024. In Louisiana, the EPA is monitoring the Louisiana Department of Environmental Quality's (LDEQ) progress in addressing modeled National Ambient Air Quality Standards (NAAQS) violations. LDEQ has identified 15 PSD permit actions since 2018 with predicted exceedances and is conducting case-by-case reviews to determine if these are indicative of actual violations or results of conservative modeling assumptions.

The document details the LA Safe program, which combined state-led data from the Coastal Master Plan with grassroots engagement to develop land-use strategies and fund resilience projects in coastal Louisiana. It emphasizes the importance of building trust through leadership programs like 'Lead the Coast' and the necessity of integrating long-term adaptation planning into state agency operations to address the 'existential emergency' of land loss.

Plaquemines Parish faces extreme risks from relative sea level rise and land subsidence, which is exacerbated by oil and gas operations and upstream flood control. The region has lost 2,300 square miles of wetlands since 1932, leaving communities vulnerable to storm surges and flooding. Predominantly Black communities, such as Ironton and Woodland, experience a confluence of socioeconomic vulnerability and pollution from refineries and coal terminals. While Louisiana's 2012 Comprehensive Master Plan for a Sustainable Coast proposes a $50 billion investment in defenses like the Mid-Barataria Sediment Diversion, critics argue the plan may use inadequate sea level rise projections and fail to protect all communities. Local residents emphasize the need for equitable resource distribution and local employment in restoration projects to ensure communities are made whole.

The report identifies 'climate equity hotspots' along the U.S. East and Gulf Coasts, where projected sea level rise and tidal flooding combine with socioeconomic risks such as poverty and minority population share. It argues that federal and state agencies must prioritize these vulnerable communities in funding and infrastructure investments to ensure an equitable response to climate change. The analysis evaluated thirty-five coastal counties across nine states and provides case studies for five specific locations, including Dorchester County, MD, and Plaquemines Parish, LA, to illustrate the challenges of environmental injustice and sinking lands.

The Union of Concerned Scientists developed a screening tool to identify coastal 'climate equity hotspots' where high climate risk overlaps with socioeconomic vulnerability. Applying this to 35 counties across the East and Gulf Coasts, the report finds that low-income and minority communities face disproportionate burdens from sea level rise and storm surges, often exacerbated by inadequate disaster recovery policies. It advocates for targeted federal funding, inclusive stakeholder engagement, and the use of actionable science to build resilience in frontline communities.

The Union of Concerned Scientists (UCS) report identifies coastal communities where socioeconomic vulnerability and climate risks overlap, creating 'climate equity hotspots.' Using a pilot study of 35 counties across nine U.S. states, the report demonstrates that African American, Latino, and Native American communities often face higher exposure to sea level rise and tidal flooding while possessing fewer resources to adapt. The authors propose a screening tool based on climate and socioeconomic indicators to guide more equitable distribution of federal and state resilience funding. The report concludes with policy recommendations to upgrade affordable housing, improve transportation for evacuations, and ensure inclusive stakeholder engagement in climate planning.

The Union of Concerned Scientists (UCS) identifies a critical need for equitable climate resilience planning in the United States, specifically for frontline coastal communities. The report introduces a screening tool that combines climate risk indicators (sea-level rise and tidal flooding) with socioeconomic data (income, poverty, race, and education) to identify 'climate equity hotspots'. Applying this tool to 35 counties across nine states, the analysis finds that the Gulf Coast and Mid-Atlantic regions face the highest risks, with Orleans Parish, Louisiana, identified as the most vulnerable hotspot. The report argues that current disaster aid often fails marginalized groups due to bureaucratic hurdles and a focus on homeowners over renters. It recommends that federal and state agencies direct funding to high-risk communities, integrate the best available climate science into planning, and increase overall funding for climate resilience.