Environmental health hazards Learn how to deal with extreme weather and other hazards that could affect your health. Air quality Resources you can use to find current air quality information for Philadelphia. Code Blue Actions the City takes when it declares a Code Blue to keep people who are homeless safe from extreme cold. Extreme weather Get relief from extreme hot or cold weather. Find a cooling center Where to find public cooling centers during times of extreme heat and humidity in Philadelphia. Get your child tested for lead Information for parents and caregivers about how to get their child tested for lead poisoning. Lead exposure Information for Philadelphians about lead safety. Protect yourself from West Nile virus and Lyme disease Learn how to protect yourself from West Nile virus and Lyme disease. Zika virus Information about Zika in Philadelphia, and how the City is working to prevent the emergence and spread of the disease.