Identifying and Combatting Micro-Urban Heat Islands in New York City

In metropolitan areas, significant temperature variations frequently exist between densely built residential zones filled with structures, concrete, and asphalt, and greener neighborhoods with more plant life. These warmer zones are called micro-urban heat islands (MUHIs), and people residing in MUHIs experience a higher incidence of heat-related issues, such as dehydration, heat exhaustion, or even heat stroke. This study mapped the locations of MUHIs in New York City over three clear summer days: June 6, 2023; August 9, 2023; and September 1, 2023. By comparing the surface temperatures of MUHIs to those in parts of a city with more green space, this study demonstrates that MUHIs are more likely to occur where there are high levels of pavement, asphalt, and industrial infrastructure. In contrast, areas in New York City with higher levels of vegetation were less likely to have MUHIs. These results suggest that planting more trees and increasing vegetation in MUHIs in New York City may help to reduce high temperatures.