Cities across the U.S. are looking to citizen science for data on heat waves and other climate impacts. But the Harlem Heat Project quantified the wide variance in how Upper Manhattan’s indoor spaces responded to outdoor conditions, according to Brian Vant-Hull, a research scientist at CUNY’s Remote Sensing Earth System Institute. The Harlem Heat Project, she said, “validated what we had already learned”—that extreme heat is “a silent killer” that affects people in their homes. Local organizations, like the Harlem Emergency Network and East Harlem Community Organizations Active in Disaster, added extreme heat to their priorities. Community science is also a valuable public education tool, Charles-Guzman said.