A new danger has emerged in the area near Notre Dame.
There is a high concentration of lead in the area and coating the nearby area.
The lead comes from the melted roof of the Cathedral.
Lead levels from the roof were found to be between 10 and 20 grams per kilogram of ground. Between 32 and 65 times the recommended limit by French health authorities of 0.3 grams per kilogram.
The areas closest to the cathedral are currently closed.