Mesa pursues urban heat island reduction through cool pavement pilots, parking lot shade requirements in the Zoning Ordinance, and tree canopy goals. Summer surface temperatures in the East Valley regularly exceed 160 degrees on dark asphalt.
Mesa's heat mitigation strategy combines Zoning Ordinance Title 11 parking lot shade standards (canopy or trees over a percentage of stalls), reflective surface pilots inspired by Phoenix's cool pavement program, and the Climate Action Plan's tree canopy goal. New commercial developments must meet landscape and shade thresholds at site plan review. The city also coordinates with Maricopa County on cooling centers during excessive heat warnings, which routinely affect Mesa's older neighborhoods with limited canopy.
Failure to install or maintain required parking lot shade landscaping is a zoning violation handled through Mesa Code Compliance with corrective notices and civil penalties.
See how other cities in Maricopa County handle heat island mitigation.
See how Mesa's heat island mitigation rules stack up against other locations.
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