The city built for 100-degree summers is being tested by the other kind of record. Phoenix hit 115 degrees Saturday afternoon, breaking a daily mark that had stood since 2011, inside an extreme heat warning now extended through Aug. 28. [5] And the infrastructure meant to keep people alive through exactly this — the Valley's network of cooling centers — has been running hot since July, when public health reporting found respite sites across the region seeing high demand day after day. [3]

Know where the doors are. The city operates a 24/7 respite center downtown at 20 W. Jackson Street, with extended-hour cooling at the Justa Center site on West Jefferson from 3 to 9 p.m., both staffed to connect walk-ins with water, shade and navigation services rather than merely a chair in an air-conditioned room. [2] The design is deliberate: overnight capacity for those with nowhere else to sleep, afternoon hours for everyone the sun catches out, and residents can dial 2-1-1 to locate the nearest site or arrange transportation to it. [2] These are not comfort stations; they are triage for heat.

The design philosophy came from City Hall in February, and it deserves scrutiny precisely because it was working. Phoenix formally recognizes extreme heat as a public health emergency, Mayor Kate Gallego said in unveiling the 2026 Heat Response Plan, which expanded overnight capacity and added an emergency heat-relief shelter partnership with UMOM for families. Office of Heat Response and Mitigation Director David Hondula called his team's approach data-driven and hyper-collaborative, and the plan's evidence was real: two consecutive years of declining heat deaths in Maricopa County, roughly 30 percent down from 2024 — proof, officials argued, that respite networks and outreach save measurable lives. [2]

This summer is stressing that proof. County data reported mid-August show heat-related deaths in Maricopa County far outpacing last year's pace, undoing the downward trend the February plan celebrated. [4] National coverage reached the same conclusion from the ground weeks earlier: as the western United States baked through successive stretches of 110-degree heat, public cooling centers were seeing high demand, with Phoenix among the hottest points on the map. [1] The crowding has not eased since; it has only followed the heat from one Valley neighborhood to the next as the warning extended again this week. [3]

The gap between the two curves is where people live. Two years of decline reflected outreach to the housed — education, utility moratoriums, early-warning messaging. The population that fills cooling rooms at 3 p.m. is disproportionately unhoused, and their exposure does not pause when the warning extends another week. [3] Overnight lows forecast above 90 mean a person who leaves a respite center at closing time walks into air that offers no physiological recovery before morning. [5]

Through Aug. 28, the practical arithmetic is simple: more hours open means fewer deaths, and every hour a center closes early spends somebody's margin. The county will audit this summer in October with body counts. The city can read its own thermometer before then.

-- NORA WHITFIELD, Chicago