Several stones fell from the vaulted ceiling of fire-ravaged Notre Dame after last month's European heat wave, a French official said Wednesday, urging renewed stabilization efforts to prevent further damage to the iconic Paris cathedral. The Culture Ministry official said the stones crumbled after temperatures reached a record 42.6 Celsius (108.7 Fahrenheit) in Paris in late July. The official said heat quickly dried out the mortar that was holding the ceiling stones in place.
