A protective sheet is being rolled over the burnt roof of Notre Dame Cathedral to prevent rain damaging the building further.
Showers and heavy downpours have been forecast for the French capital this week.
But the tarpaulin will only be a temporary measure until a more permanent solution is built.
Oliver Whitfield-Miocic reports from Paris:

US expected to send thousands of soldiers to Middle East
One killed, five injured in Bahrain from Iran strikes
Qatar is not directly mediating between US and Iran, ministry spokesperson says
Germany, France in rare rebuke of Trump over Iran war
Philippine president declares energy emergency over Middle East conflict risks
New York's LaGuardia airport faces second day of delays, cancellations after collision
Iran sends missiles into Israel, dismisses Trump's talk of negotiations as 'fake news'
Lebanon declares Iranian envoy persona non grata, asks him to leave by Sunday
