While Paris City Council activates its "heat wave plan", the trees in the Buttes-Chaumont park - like many others around the French capital - are suffering from the drought, the leaves of some dying unusually early for the season. But this is not a cause for concern for either the walkers or the park manager, says Irène Henriques. "This will not prevent the tree from starting up again next spring. In fact, it is protecting itself by dropping its leaves." IMAGES AND SOUNDBITES