PARIS - Notre Dame Cathedral was on fire and crews were on the scene on Monday.
Yellow clouds of smoke could be seen billowing into an otherwise perfect blue sky. The central spire was completely engulfed in flames. A large portion of roof was already burned through.
Firefighters at the scene were pumping water from cranes.
The iconic building in the center of the city is the most visited monument in Paris, with more than 12 million visitors a year - nearly double the people who visit Eiffel Tower.