CDPH reviews the impact of high temperatures on different populations and neighborhoods and analyzes heat-related emergency room visits occurring in the summer months. This report highlights that some population groups and specific zip codes are more highly impacted by heat and humidity than others. This information is valuable for all Chicagoans to prepare for upcoming extreme heat events in Chicago.  CDPH has continued tracking similar data throughout the recent heat advisory alert this past weekend. Early signs indicate that emergency visits were higher among people 65 years and older and residents of the north and northwest sides of the city. Once data collection is complete, additional tips will be shared to help further inform heat preparedness and response efforts this summer.  CDPH encourages residents to learn about the signs of heat-related illness and public health guidance regarding heat preparedness to stay safe during future heat waves. Collaboration continues with Northwestern University Buffett Institute to limit the harmful effects of extreme weather events in Chicago, which includes creating a heat vulnerability index with academic and community partners to identify Chicago communities most at risk from extreme heat.