So is this mostly the north of France outside of Paris where the votes have been counted?
Mostly rural France nationwide.
On that point, two more southern departments are joining Lozčre:
Alpes-de-Haute-Provence: 51.45% Le Pen, 48.55% Macron. 67% voted for a candidate, and did not abstain or vote blanc.
Cantal: 56.1% Macron, 43.9% Le Pen. 69.43% voted for a candidate.
We're seeing Macron around 13-14 points below his 2017 result throughout the mostly rural and Southern departments that have fully reported so far. So either the projections are significantly off (unlikely) or, more likely, he's lost more ground than average in those places compared to more urban areas. In other words, the cleavage between metropolitan and peripheral France has gotten even deeper.
I guess I should be happy to have another data point for my postdoctoral research, but I'd like nothing more than to see it proven wrong. 
So far.in Ile de France it seems to be more like 5-6%.
