A spark is also a street problem

Dmitri knows the dry edge of a neighbourhood. Cessange can feel urban at the crossing and almost rural three minutes later, where grass, hedges and field paths make a cigarette butt suddenly larger than the hand that dropped it.

"A spark is never only private," he writes. "On a dry day, it borrows the whole landscape."

Dryness asks for manners

The City has relayed wildfire and forest-fire guidance from the national disaster-risk platform after a run of hot weather and little rain. The warning is ordinary on purpose: dry vegetation in meadows, fields and forests can turn careless acts into fires.

The examples are small enough to feel insulting until one imagines them landing in dry grass: a cigarette butt, a spark from a vehicle, a machine working near fields, a barbecue treated as finished while the ashes still hold heat.

• Do not throw cigarette butts into nature.
• Do not light fires outside authorised places.
• Use only designated barbecue areas and keep water nearby.
• Let charcoal and ashes cool completely before disposal.

The route for help is part of prevention

The advice is not only about flame. It is also about access. Drivers should avoid crossing meadows, fields and forests and should not block roads or entrances that emergency crews may need. A blocked track can become a second accident before the first one is under control.

If a fire starts, the instruction is clear: call 112, give the precise location, mention any forest emergency point, and guide firefighters if possible. Dmitri likes the modesty of that sequence. It assumes panic may arrive, then gives it a job.

Heat changes the size of habits

The same week, the City has also been telling residents to drink, seek shade and use public water points during the heat wave. The two messages belong together. A hot city is protected by infrastructure, but also by restraint.

By evening, Dmitri looks again at the edge paths. The rule is not fear. It is proportion: when the ground is dry, the smallest habits become public works.