The upcoming heat wave is expected to affect residents across Philadelphia, particularly those without access to air conditioning or adequate cooling. Feels-like temperatures nearing 100 °F (37.8 °C) could lead to heat-related illnesses such as heat exhaustion or heat stroke. Vulnerable groups, including the elderly, children, and individuals with pre-existing health conditions, are at heightened risk. Outdoor workers and those engaging in strenuous activities should also exercise caution.