During very hot weather, the City will declare a Heat Health Emergency. When we declare a Heat Health Emergency, we activate several City services to ensure our residents stay safe.
During a Heat Health Emergency it’s important to check on loved ones, neighbors, and pets and look out for each other. When daytime temperatures reach the 90s or triple digits and are accompanied by high humidity for two or more days, dehydration, heat exhaustion, and heat stroke can happen. If you think someone is having a medical emergency, call 911.
https://www.phila.gov/2019-06-11-what-happens-when-the-city-declares-a-heat-health-emergency/
The Collected Works of Jim Garrow 