Phoenix's 2026 Heat Response Plan contains 23 actions organized around first responders, cooling and drinking-water access, safer homes, mobility and recreation, worker safety, and public education as part of the city's broader heat resilience work. The city reports that confirmed heat-related deaths fell about 30% from 2024 to 2025, although fire-department calls for heat illness increased. Phoenix also maintains broader shade, housing and weatherization programs outside the seasonal response plan. With extreme heat remaining a recurring public-health threat, the city has to decide which interventions deserve the fastest marginal expansion. Cooling centers save people during a heat wave, while shade and home improvements reduce exposure before an emergency begins. Phoenix needs both time horizons.