France's Green party said on Tuesday it planned to put forward a vote of no confidence in the government over its handling of a heatwave response as the country counted heat-related deaths from two episodes of extreme heat so far this year.

France experienced five days of unseasonably high temperatures in May, followed by a record-breaking 11-day heatwave in June that has claimed at least 1,000 lives. Health officials said that the toll is expected to rise significantly.

While the motion of no confidence is not expected to pass, it reflects the anger of some French politicians over what they describe as the government's inadequate measures to help France face sweltering heat of above 40C in many parts of the country this month.

Green parliamentary leader Cyrielle Chatelain said her party planned to submit a motion of no confidence against Sébastien Lecornu's government on Tuesday.

Her party also called for a commission of inquiry into the government's policy for adapting to rising temperatures.