In late May 2026, a heat wave is killing people across Europe and erasing temperature records that had stood for decades, according to reporting from The Washington Post. Cities in Spain, France, and the Balkans are seeing conditions that their built environments — and their residents — were not designed to survive.

Washington state has already run this experiment once, in June 2021. Temperatures in Seattle hit 108°F. Lytton, just across the border in British Columbia, reached 121°F before burning to the ground the next day. The Washington State Department of Health confirmed more than 100 heat-related deaths in the state during that event. Most victims were elderly, living alone, without air conditioning, in homes that had absorbed days of heat and couldn't release it at night.

What's actually changing

The mechanism in Europe right now mirrors what hit the Pacific Northwest five years ago: a heat dome. High pressure stalls over a region, trapping hot air and preventing the usual overnight cooling that lets bodies and buildings recover. Without that nighttime dip, core temperatures in homes climb day over day.

Western Washington is structurally vulnerable in ways most residents still underestimate. Historically mild summers meant that roughly half of Seattle-area homes had no central air conditioning as of recent American Housing Survey estimates. That ratio has shifted since 2021, but the older housing stock — craftsman homes, older apartments, concrete buildings with west-facing windows — still absorbs and holds heat badly. Eastern Washington, including Spokane and the Tri-Cities, faces even more intense baseline heat and has for years.

The Europe event is also arriving earlier in the calendar than historical norms. That matters because heat preparedness tends to be a "we'll get to it" task that people defer until July. When the event comes in late May or June, those plans haven't been made.

What we'd actually do

Check your cooling plan against the 2021 scenario, not a normal summer. A fan that works fine at 85°F becomes nearly useless at 105°F and dangerous if it's just circulating hot air. If your household's plan is "open windows and use fans," that plan failed thousands of Washington households in 2021. Identify your nearest cooling center now — King County, Pierce County, and Spokane County all maintain updated lists through their emergency management websites — before you need them.

Audit who in your household or immediate network is isolated and without AC. The 2021 deaths were concentrated among people living alone, over 65, with no one checking on them. If you have a neighbor, parent, or relative who fits that profile, make a specific agreement now about check-in frequency during heat events. "I'll call you" is not a plan. "I'll call you at 10am and 4pm on any day the forecast exceeds 95°F" is a plan.

Pre-cool your home before the event peaks, not during it. Thermal mass works both ways. If you run AC or open windows aggressively the night before a multi-day heat event, you start with a cooler baseline. Most people wait until they're already uncomfortable, by which point the walls and floors have already stored two days of heat.

Stock oral rehydration supplies, not just water. Sweating heavily depletes electrolytes, and plain water doesn't replace them fast enough during sustained exertion or high heat exposure. A supply of electrolyte packets — inexpensive, shelf-stable, available at any grocery store — matters more than most heat prep lists acknowledge. This is especially relevant for households with young children or elderly members.

Know the difference between heat exhaustion and heat stroke. Heat stroke is a medical emergency. Confusion, hot dry skin, loss of consciousness: call 911. Heat exhaustion — heavy sweating, weakness, cool clammy skin — can be managed at home with cooling and hydration but requires immediate action. The Washington State Department of Health posts clear guidance each summer; read it now, not in August.

The bigger picture

Europe's heat event is not a prediction about Washington's summer. It's a data point in a pattern. The 2021 heat dome was described at the time as a once-in-a-millennium event. That framing has aged poorly. What it actually demonstrated was that the Pacific Northwest's building stock, social infrastructure, and household habits were calibrated for a climate that no longer reliably shows up.

Durable households aren't the ones with the most gear. They're the ones that have thought through the specific failure modes in their specific situation and made small, cheap, reversible preparations before the stress arrives. Europe is showing that stress arrives faster than the forecast models say it will.