When the Sky Turned Orange

Last week, Andrew watched the sky over his home west of Toronto turn orange in the middle of the day. It wasn't the first sign something was wrong. Hours earlier the air outside had started to smell and taste like a campfire. By afternoon, Toronto briefly registered the worst air quality index of any city in the world. The cause was smoke from nearly 900 active wildfires burning across Canada, the vast majority tracing the path of the boreal forest from the east coast all the way to Northwestern Ontario.

Northwestern Ontario isn't densely populated compared to the south, but it is home to First Nations communities and small towns that took the direct hit. Residents were evacuated, some by boat, some airlifted out, often with little warning. Homes, memories, and in some cases entire communities were lost, with no clear timeline for when residents can return. This is now the third year in four that evacuations of this scale have happened in the region.

Why the Fires Started, and Why the Arson Theory Doesn't Hold Up

Most of this season's Ontario wildfires were sparked by lightning, not people. Conspiracy theories blaming arson have circulated online, but arson accounts for well under a quarter of wildfire cases, a small fraction of the total. An active El Nino pattern is drying out the region further, and scientists point to human-caused climate change as the underlying driver of the extreme heat and dryness that let ordinary lightning-caused fires explode into the fires we saw this year.

The Ocean Connection

Here's the piece that ties this back to the show's core mission. The boreal forest is one of the planet's largest carbon sinks. When it burns, that stored carbon is released into the atmosphere, and roughly a quarter of all human-caused CO2 emissions eventually get absorbed by the ocean, a process that drives ocean acidification. Fire retardant and ash also run off into watersheds, and in Northwestern Ontario those waterways feed into the Great Lakes, which connect to the Atlantic via the Gulf of St. Lawrence, or into Hudson Bay and the Arctic depending on which way the water flows. The smoke and the heat dome behind it are ultimately part of one connected land, ocean, and atmosphere system.

The Politics: A Budget Fight and a Border Fight

Ontario spent $271 million on emergency firefighting in 2025-26, but budgeted only $150 million for 2026-27, a significant cut to the baseline. Premier Doug Ford has defended the province's preparedness, pointing out that emergency funding gets added when needed. But baseline funding matters because it lets fire crews prepare proactively instead of scrambling to catch up once fires are already out of control.

Meanwhile, US President Trump and several US senators have called for tariffs and sanctions against Canada over the wildfire smoke reaching American skies. Andrew pushes back on this framing directly. Canada and the US routinely send each other firefighters and equipment during wildfire emergencies, including a Canadian firefighter who died fighting fires in Colorado this year on a mission to help the US. Smoke and wildfires don't recognize borders; they respond to heat and dryness, and Andrew argues that punishing a close ally for a shared climate problem misses the point entirely.

Takeaways From the Episode

• Nearly 900 wildfires were burning across Canada as of July 16, most following the boreal forest belt into Northwestern Ontario.
• Vulnerable First Nations communities and small towns bore the brunt of evacuations; some residents had to self-evacuate by boat or air with little warning.
• Most fires were lightning-caused, not arson; arson accounts for well under a quarter of cases despite online conspiracy theories.
• Burning boreal forest releases stored carbon into the atmosphere, and roughly a quarter of human-caused CO2 emissions get absorbed by the ocean, tying wildfires directly to ocean acidification.
• Ontario cut its baseline emergency firefighting budget from $271 million spent to $150 million budgeted for the coming year, a proactive-versus-reactive funding problem.
• US tariffs and sanctions threats against Canada over the smoke ignore how often the two countries help each other fight fires, including the loss of a Canadian firefighter in Colorado this year.
• Individual actions still matter: check air quality indexes before extended time outdoors, follow evacuation orders immediately if you're in a fire zone, keep a 72-hour go bag ready, and contact your elected officials if wildfire underfunding frustrates you.