UPDATE: my map was built honestly, but the viral original I was responding to is even worse than I thought! Many thanks to
@Tree_Coder,
@pepitorias,
@ortegadry and others for unpicking it.
Three layers of deception in that original:
1. The colour fields for BOTH years are a 2025 forecast, not 1976 or 2026 data at all!
2. The scale shows anomalies, not absolute temperatures, so the visual impression of "same heat" is baked in by design!
3. The city callout numbers were invented to match the fake palette
@pepitorias notes that on 24 June 1976 specifically, Bordeaux hit 35.4°C, Paris ~32.8°C, Madrid 29.2°C. Yesterday those cities hit 44.7°C, >40°C and ~40°C respectively.
I've rebuilt using verified station records (Met Office, AEMET, Météo-France, KNMI, DWD, ERA5) updated with 24 Jun confirmed peaks.
The real data is extraordinary.
You don't need to fabricate anything, which is precisely why someone did.
I’m seeing these maps being thrown around by 1976-obsessed climate "sceptics".
The problem is obvious: the viral image compares colour palettes, not climate.
So here's a more honest version: same selected city labels, same visual logic, but with verified peak callouts added.
And note: the 2026 panel is only "so far". Many of those peaks were recorded in May.
Let's revisit after this heatwave.
Then again at the end of the year.