From the comments of http://wallow.us
Will facemasks or dust masks protect me from the smoke?
In order for a mask to provide protection during a smoke event, it must be able to filter very small particles (around 0.3 to 0.1 microns), and it must fit, providing an airtight seal around the wearer’s face.
Dust masks are not enough. Paper “comfort” or “dust” masks commonly found at hardware stores are designed to trap large particles, such as sawdust. These masks will not protect your lungs from smoke. It is best to stay indoors and limit your exposure to the smoke.
Will a wet towel or bandana provide any help?
Wet towels or bandanas have the same shortcomings as paper dust masks. We do not recommend that they be used.