Some comments: First, regardless of what type of brick or masonry that you have, if you have an airspace, or cavity behind the veneer, then you need weepholes at the masonry sill, opening head/sills, etc. Second, assuming that there is a good through-wall flashing installed, a little water temporarily in the weep holes is no problem as long as the water level does not rise above the top of the flashing (and assuming that the flashing is not compromised). Of course, weep holes beneath grade level are not a good idea in any case. A