Emmanuel Macron is facing calls to resign after losing his third Prime Minister in just one year, with fears strikes could lead to a "day of insurrection".
French Prime Minister Francois Bayrou lost a confidence vote of MPs over his budget, which sent the country into political turbulence, with it on the verge of an economic crisis.
A national day of disruption is planned for Wednesday organised by anti-Macron protesters, who prepare to bring the entire country to a total standstill.
Called Bloquons Tout, or "let's block everything," the general strike will see around 100,000 demonstrators walk out of their offices as unions prepare to shut down France.
French Interior Minister Bruno Retailleau warned that the day of unrest could turn into an "insurrectional climate" and spiral out of control.
The Paris Police Prefecture, Laurent Nunez, echoed the warning and urged people to expect "sabotage" attempts and major travel disruptions.
Mr Nunez said: "It's a movement that doesn't really have any organisers, it's a general call with a multitude of actions, and we see that the call has been taken up by the ultra-left and far-left movements who are calling for rather harsh actions."
Some 80,000 officers will be deployed in an "exceptional" operation.
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Mr Macron is facing calls to resign
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It is the beginning of a month of chaos for Mr Macron, with trade unions preparing to hold strikes and protests on September 18.
Several railway unions have supported the strikes, with multiple flights expected to be cancelled due to excessive delays.
Mr Macron is receiving calls to resign or be impeached following the collapse of his Government.
He currently faces the tough call of who to appoint as his seventh Prime Minister, following the resignation of Francois Bayrou after he lost a confidence vote.
Shops in Paris prepare for the protest scheduled for tomorrow
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The French President confirmed his resignation today, after just nine months in office.
France's National Assembly voted 364 to 194 to remove Mr Bayrou from office and bring down Mr Macron's minority Government.
The next Government's immediate task will be to pass a budget, similar to the challenge Mr Bayrou faced.
Prominent French MP Marine Le Pen said after the Prime Minister's resignation: "This moment marks the end of the agony of a phantom Government."
Mr Bayrou was seen leaving the French parliament yesterday after losing the confidence vote
| REUTERSShe is pushing for a snap parliamentary election, which Mr Macron has so far ruled out.
Jean-Luc Melenchon, leader of France Unbowed, said on X: "Macron is now on the front line facing the people. He too must go."
French National Assembly Deputy Mathilde Panot called for the French President to either resign or be impeached.
According to a poll by Odoxa-Backbone for Le Figaro newspaper, 64 per cent of French people want Mr Macron to resign rather than name a new Prime Minister.