And of course, wind proponents will need to also include the cost of backup by other sources when plants are temporarily or permanently disabled by such events.

1st, nice catch J. (and spot on comment.)

Seriously, wind installations, particularly in north america, have a lot of experience with fire. Windparks are never installed in forested areas.  They are installed in grasslands, farmlands, or at worst some brushy areas. They have often been subjected to fires sweeping the lands, and sometimes even caused them. There has been very little damage to the turbines themselves, or even to the equipment on the ground (though there are instances of some damage.)

In far more cases, the development leads to increased fire protection and fire breaks, from roadways and construction clearing. In very rare instances, the turbines themselves, like any electrical equipment, have started fires.

All of it is covered in standard, financeable insurance contracts.

I've been on the ground as fire swept through hundreds of acres or more, and the turbines were not damaged. In the Altamont, we had fires because a local sport would be shooting out the transformer coolant (typical amurkan sport).

to my knowledge, all radioactive material produced by operating windplants is stored onsite only briefly, then shipped by horse and buggy (with armed federal cowboys) to the central wind half-life facilities in El Paso.  Europe uses underwater storage in Venice.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin