Although there are not many blooming flowers this time of year there are plenty of pollen and spores causing you to suffer: The Big One: RAGWEED begins pollenating in August with the warm days cool nights and is in peak season NOW. Molds: As we pile up dead leaves they will contain moisture, basements will have excess moisture, bathrooms may have moisture, all lead to mold. Dust mites: Microscopic spider-like insects that are stirred up with turning on the furnace. Children: Not as the cause, but kids suffer as they are exposed to dust mites, molds in ther schools from the summer heat, chalk dust. Food allergies: Always a threat.