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Updates as of June 28, 2022:
Extreme heat is a major public health concern in California. Exposure to extreme heat can cause a variety of health problems, including heat stroke and death. Cooling centers  (a cool site or air-conditioned facility designed to provide relief and protection from heat) are used by many communities to protect health during heat events. Even as COVID-19 vaccination coverage increases, prevention measures are still necessary as cooling centers can potentially become settings for increased risk of transmission of COVID-19 among both visitors and staff. In addition, groups of people at higher risk for severe COVID-19 illness, such as older adults or those with underlying medical conditions, may congregate at cooling centers. This document provides guidance to support a safe, clean environment for members of the public and workers at cooling centers.
 This only applies to facilities that are solely operating as cooling centers (as opposed to libraries, etc. that are also listed as cooling centers but also operate a separate business during normal operations).