The first thing I did when I was told about the fire was to check this:
It seems that the cloud should be going S-W, so supposedly we are safe. Supposedly.
I wanted to ride tonight but I already have problems with my bronchus....
I've checked different masks these days but the one posted by @nonredneck seems a better option.
This one is sold on ruten (thanks @Icon): http://www.chainreactioncycles.com/es/en/respro-sportsstar-anti-pollution-mask/rp-prod8649 / https://tw.bid.yahoo.com/item/%E3%80%90%E8%8B%B1%E5%9C%8BRESPRO%E5%8F%A3%E7%BD%A9%E3%80%91Sportsta-Mask-%E9%BB%91%E8%89%B2-%E5%8F%AA%E5%89%A9L%E8%99%9F-100024718343
But this review puts me off:
Uncomfortable and does not filter UFPs as stated.
by Anonymous, 19 May 2011, 17 out of 18 people found this review helpful
Compared to the 3M 9211 mask which is merely $10, this is uncomfortable and works poorly.
Hard to get a good seal on the mask. The single strap fastening system slips down the neck. So you have to tighten it greatly, which puts pressure on the nose. The metal piece can help get an upper seal, but a lower chin seal is a problem.
But even if you get a seal, it does not filter the air as stated. It removes only 40% of the particles in the sub-micrometer range, allowing the smallest "nuclei mode" particles 0.005-0.05 µm to pass through completely, which have shown to be the most toxic.
The 3M mask removes 90%, and it is only rated to remove larger particles.
I would only recommend this mask for protection against large particles (like sawdust, or dirt dust blown up from mountain bike trails), and for someone running/riding in cold weather. Further, it may not be designed best for slender facial structures, because of the difficulty in getting a seal.
Do not think the high price means it will work better than the cheap mask. Do not give in. Would not recommend to anyone.