"The plume of ash from the mega-fire at in the region has been clearly visible in satellite imagery since dawn.
An area of high cloud is moving in from the north-west. The Tramontane will weaken and a sea breeze regime will set in.
from the Canadian fires is affecting more of western Europe." (source: Keraunos.org 06/08 13:52)

A good example that influence more than one country or regional weather only.

Video showing southern France and the movements of fire dust clouds and real clouds.
Video showing southern France and the movements of fire dust clouds and real clouds.