Ketchikan boasts of an average of slightly greater than 180 inches of rain a year. This leads to incredible growth and buildup of duff on the forest floor. I have seen fire there though. All of them have been in areas of thick duff and are very smoky and smoldering. Never saw flames and I assume they were the products of spontaneous combustion.
Dry spells do cause problems in some areas with logging though.
I guess they are worried about fires in the log yards. All the dreadful can be dangerous. I once fell though dreadful and had a very hard time getting out. On Prince of Wales Island there is the additional worry of caves and sinkholes. The geology is Karst Limestone and there are thousands of caves.