Police say properties in Fort Augustus, Letterfinlay, Banavie and Drumnadrochit were broken into.
A number of nearby properties in Banavie have been evacuated and people are urged to avoid the area.
There have been long running complaints about congestion in the Lochaber town.
The Caledonian Canal's Neptune Staircase and Gairlochy Lighthouse are to be illuminated on Saturday.
