Record rainfall in France this month has caused severe flooding in parts of north-east France, causing the evacuation of homes, the closure of public services and businesses, and the devastation of farmland.
Prime minister Élisabeth Borne, representatives of several parties on the left, conservatives and centrists of President Emmanuel Macron's party as well as far-right leader Marine Le Pen attended Sunday’s march in the French capital amid tight security.
In an exclusive interview with the BBC at the Élysée Palace, the French president said that the killing of babies and women in Gaza must stop, that was "no justification" for the bombing, and that a ceasefire would benefit Israel.
Radical-left La France Insoumise (LFI) party says it will boycott the "great civic march" on Sunday called by the speakers of the country's two houses of parliament, while the participation of the far-right Rassemblement National (RN) is creating a headache for the left and centre-left.