In the midst of the city's first official heat wave this year, a new joint news venture seeks to track temperatures in Harlem apartments with no air conditioning.

A. Adam Glenn, founder and editor of AdaptNY, Sarah Gonzalez, WNYC and NJPR's northern New Jersey enterprise reporter, and John Keefe, WNYC senior editor for data news, explain how it works and what they hope to learn.

@WNYC is pairing up with @AdaptNY to study the urban heat island effect in Harlem this summer! pic.twitter.com/qxXJPeSFWQ

— Brian Lehrer Show (@BrianLehrer) July 8, 2016