Nouakchott, Mauritania — 2019–2025
The Heat Tax
Nouakchott loses 20% of its economic potential
Nouakchott operates at only 80% of its potential. Heat takes the rest.
Every year, temperature costs the city $73 million — in lost work hours and electricity bills. This is not a projection. It's an observation.
The heat tax
What heat actually costs
There's a cost nobody bills but everybody pays. In Nouakchott, when the thermometer passes 33°C — which happens most of the year — the human body slows down. This isn't a question of willpower. It's physiology. The International Labour Organization has quantified this: beyond certain temperature thresholds, work capacity drops in measurable and predictable ways.
We applied that curve to Nouakchott. Hour by hour, month by month, across six years of weather data. And we counted what the city loses — in income for exposed workers, and in electricity for those who can afford air conditioning.
The result: Nouakchott runs at 80% of what it could produce. The remaining 20% is the heat tax. Nobody voted for it, but everyone pays it.
The numbers
Six years of heat, counted
Two independent components, no double counting. Lost hours affect those who work outdoors. The electricity bill affects those with AC. They're not the same people.
The sharpest finding
October, not July
Everyone in Nouakchott knows that the hardest months aren't the ones outsiders expect. July has the harmattan — a dry wind that, despite the heat, brings relative relief. October has nothing. October is humid heat without respite, nights that don't cool down, air that stays heavy from morning to evening.
The data confirms what Nouakchottois have always known: October is the worst month, with 37.8% of capacity lost. January, the most clement, loses only 9%. The gap between the two is a chasm — that's where the city's productivity plays out.
Air conditioning in Nouakchott isn't about comfort. It's a class marker. Those who can afford it keep working. Those who can't, stop.
Explore the analysis
How we counted
Each section details one aspect. The data, the method, the assumptions — everything is open.
The ILO/ISO Curve
How temperature reduces work capacity. The reference curve, applied to Nouakchott's temperatures hour by hour.
730 Hours Lost
What losing 730 hours per year means for an exposed worker. Monthly breakdown, wage scenarios, human cost.
The AC Premium
Air conditioning as a class marker. Where the 94,296 commercial spaces come from, how many are equipped, what it costs.
The Full Equation
The synthesis. Lost income + AC premium = the heat tax. What Nouakchott loses every year, and what it means.
Methodology
Every assumption declared, every formula shown, every limitation named. We didn't model — we observed and counted.
Sources & Data
All sources used, their access status, and the link to the GitHub repository to reproduce the analysis.
We didn't model anything. We observed the city, and counted.