Heat Island Mitigation
Environmental Rules
Citywide programs to reduce urban heat, tree canopy goals, cool surfaces, shade structures at bus stops, and cooling-center requirements during heat waves.
How Heat Island Mitigation Rules Differ by Place
San Bernardino County, CA: Cool roofs and heat island mitigation in desert zones
Some RestrictionsCalifornia Title 24 Building Energy Efficiency Standards mandate cool-roof reflectance values for new and re-roofed buildings in San Bernardino County climate zones 10, 14, 15, and 16…
Washington, DC: Washington DC Green Roof Heat Island Credit
Some RestrictionsWashington's Green Area Ratio (GAR) rule, mandatory for building permits in every zone except the R and RF residential zones since October 1, 2013, exists specifically to mitigate the…
Philadelphia, PA: Philadelphia heat-island mitigation through canopy and cool surfaces
Some RestrictionsPhiladelphia targets a 30 percent tree canopy citywide under Philly Tree Plan (2023) and Greenworks. Heat Response and Beat the Heat programs deploy cooling centers, cool roofs (Code…
Cities & Counties with Heat Island Mitigation Rules
5 locations
District of Columbia
Pennsylvania
Other Environmental Rules Topics
Stormwater Management
Requirements for managing rainwater runoff on your property, including retention basins, permeable surfaces, and drainage plans.
Erosion Control
Rules to prevent soil erosion during construction and landscaping, including required sediment barriers and ground cover standards.
Coastal Development
Building restrictions near coastlines, including setbacks from the water, dune protection rules, and coastal commission permits.
Flood Zones
Building requirements for properties in FEMA flood zones, including elevation standards, flood insurance mandates, and construction limits.
Shoreline Management
Regulations for properties along lakes, rivers, and coastlines, including buffer zones, dock permits, and vegetation requirements.
Sea Wall & Bulkhead
Requirements for maintaining sea walls, bulkheads, and retaining structures on waterfront properties, including inspection schedules and repair obligations.
Mangrove Protection
Rules protecting mangrove trees and coastal vegetation, including trimming restrictions, removal prohibitions, and required setbacks from mangrove habitat.
Boat Dock Permits
Permits required to build or modify boat docks, lifts, and davits on waterfront properties, including size limits, setbacks, and environmental reviews.
Defensible Space
Mandated vegetation clearance zones around homes in fire hazard zones, including the 100-ft Zone 0/1/2 model used by California and other wildfire-prone states.
Vehicle Idling Restrictions
Limits on how long heavy-duty vehicles, buses, and passenger cars may idle, including bans near schools and residential areas.
Climate Emergency Mobilization
Local climate-emergency declarations and mobilization plans, including building electrification mandates, gas-hookup bans in new construction, and reach codes.
Sustainable Procurement
City rules requiring sustainable, recycled, or low-emissions products in municipal purchasing, and how those rules trickle down to contractors and concessions.
Cool Pavement
Reflective-coating road treatments deployed by LA Bureau of Street Services to reduce surface temps; pilot streets and expansion plans under Cool Streets LA.
Cool Roof Requirements
Mandatory high-reflectance roofing materials for new construction and reroofs. LA Green Building Code thresholds and Title 24 Pt 6 baseline.
Flood Elevation Requirements
FEMA NFIP minimum base flood elevation (BFE) construction standards for properties in mapped flood zones, including freeboard requirements above BFE.