Homes across Washington were designed around winter. Cooling was an afterthought west of the Cascades and until recently many houses had none at all. Summers have changed faster than the housing stock.
Service cooling early
Demand spikes the week temperatures rise and every contractor is booked simultaneously. Testing the system on a mild spring day and booking service then avoids that entirely.
Change filters, clear vegetation and debris from around the outdoor unit, and confirm it actually cools. In the Tri-Cities and Yakima this is not optional maintenance — a cooling failure during a triple-digit stretch is a health matter, particularly for older residents.
Stop heat getting in
Cheaper and more effective than removing it afterwards.
South and west-facing glazing is where most solar heat gain happens. External shading — awnings, shutters, or planting — works better than internal blinds, because internal coverings block light after the heat is already inside the glass.
Closing curtains and blinds on the sunny side during the day makes a real difference in homes without cooling, which is still a substantial share of Western Washington housing.
Use the night
Puget Sound and Eastern Washington both benefit from large day-night temperature swings. Opening up at night to flush the house with cool air, then closing everything before the day heats up, is genuinely effective.
It works less well during wildfire smoke events, which is the complication discussed below.
The attic
An unventilated attic gets extremely hot and radiates that heat downward into the rooms below all evening.
Adequate attic ventilation — clear soffit vents drawing air in, ridge or roof vents exhausting — reduces this. So does insulation, which works in both directions: keeping heat out in summer as well as in during winter.
This is one of the reasons attic work has better returns than most efficiency spending in Washington.
Ceiling fans
They cool people rather than rooms, by moving air across skin. That is genuinely useful and it is why running them in empty rooms achieves nothing.
Check the direction — most have a reverse switch, and summer operation should push air downward.
Wildfire smoke
A summer reality across Washington now, and it complicates the night-flushing strategy considerably.
During smoke events, keep windows closed and rely on filtration. A higher-rated filter in a forced-air system helps if the system can handle the airflow restriction — check with an HVAC contractor rather than assuming, since a filter too restrictive for the equipment causes its own problems.
Portable air cleaners sized for the room are effective. Identifying one room that can be kept cleanest is a practical approach for households with respiratory sensitivity.
Worth checking before smoke season whether your system has a fresh-air intake and how to close it.
If you have no cooling
Still common in Western Washington. Night flushing, daytime shading and fans go a long way in a typical summer.
During genuine heat events, know where the nearest cooling centre is and check on neighbours who may be vulnerable. Heat is more dangerous in places unaccustomed to it, precisely because the housing and the habits are not built around it.
If you are considering cooling
Autumn or winter is the time to price it, not during a heatwave. Quotes obtained in the middle of a hot spell are made under pressure and into a fully booked market.