Results of urbanization like asphalt, dense buildings, and lack of vegetation cause these areas to retain more heat and create an "urban heat island effect". Timed with the summer season, CIRCA's research team deployed thirteen heat sensors (like the one shown on the right) throughout the city of Norwalk in June. These sensors measure relative humidity and dew point temperature at street level and the data collected will help identify urban areas vulnerable to extreme heat. To learn more about the Norwalk Heat Study click HERE. CIRCA will also be deploying six heat sensors in Danbury this month. Click HERE to learn more about the Danbury Heat Study.