Doctors and pharmacists in Alberta and British Columbia are telling everyone that potassium iodide is absolutely not needed. The radioactive iodine in any cloud drifting this way would be dispersed long before it reaches this area (or any of Canada).

Alberta has no reactors, nor does the provincial government have any interest in them at this time. Out of curiosity, I looked at the sources of our electricity- 44% coal, 41% natural gas (increasing), 7% hydro, 6% wind. Little liklihood of solar here- dark winters.
British Columbia is 86% hydro, 9% biomass, 6% natural gas.
Neighboring Washington is 84% hydro, 9% wind and 4% nuclear (one plant).