When the Heat Doesn’t Leave the Apartment: A Vancouver Reflection on Extreme Heat Preparedness

 When the Heat Doesn’t Leave the Apartment: A Vancouver Reflection on Extreme Heat Preparedness

We often think of heat as something temporary — a hot afternoon, a beach day, a few uncomfortable hours before the evening cools everything down again.

But what happens when the heat doesn’t leave?

What happens when the temperature inside your home stays high through the night, and then rises again the next day, and the day after that?

This is not a theoretical question anymore. It is something Vancouver has already experienced, and something many places in the world are experiencing right now.

During the 2021 heat dome in British Columbia, thousands of people learned how quickly a “cool coastal climate” can become dangerous. Some homes became traps of accumulated heat. Some people went to bed in hot rooms and woke up still overheated. In many cases, it wasn’t just the daytime heat — it was the lack of nighttime cooling that made recovery impossible.

That is the part people underestimate.

The body relies on cooler nights to reset. When that doesn’t happen, stress builds. Sleep becomes shallow or impossible. Dehydration accumulates. Heat stops being a discomfort and becomes a physiological burden that compounds day after day.

In older or poorly insulated apartments, especially top-floor units or buildings without cross-ventilation or air conditioning, indoor temperatures can remain dangerously high even after sunset. Concrete and glass hold heat. Walls radiate it back into the room. Windows that were meant for light become heat collectors.

After a few days of that cycle, the body starts to feel like it cannot fully cool down anymore. Not because of fear — but because of biology.

This is where the question of preparedness becomes very real.

Vancouver is not a city built for sustained extreme heat. Many buildings were designed for mild summers, not prolonged heat events. While there have been improvements in emergency response and public cooling centres since the 2021 heat dome, the reality is that many residents still live in spaces that can become unsafe during multi-day heat waves.

This is especially true for people in apartments without air conditioning, people living alone, seniors, and anyone without easy access to cooler environments.

So we have to ask an uncomfortable but necessary question:

What happens if a Europe-style heat wave pattern — the kind that traps heat for days under a stalled weather system — becomes more common here?

For some people, the answer will be simple and immediate: they will have to leave.

Not because they want to, but because staying would not be safe. Sleeping elsewhere, finding cooler spaces, or creating informal cooling networks may become part of how people cope — especially during prolonged events.

This is not alarmism. It is adaptation thinking.

Because the goal is not to panic. The goal is to recognize that heat is no longer just a seasonal inconvenience. It is becoming a sustained environmental condition that interacts directly with housing, inequality, and infrastructure.

And the most important shift may be this:

We stop thinking of heat as something we “tolerate” indoors, and start treating it as something we actively plan around — the same way we plan for storms, outages, or wildfire smoke.

The experience of heat is no longer just about weather.

It is about whether our homes can still keep us safe when the climate stops cooling down.