France's Bastille Day on July 14 faces intense heat.
Heat warnings led to the dropping of fireworks and community dances in Melun and Cachan.
In Nice, ceremonies include a memorial in memory of the tragedy.
The troop procession on the Champs-Élysées omitting the typical enrolment.
For the first time, Ukrainian troops will march alongside French forces.
Attendees may view the parade from the boulevard no advance booking required.
The lineup further displays troops from French overseas bases and veteran units.
Government bodies alert that high temperatures might disrupt later events.