Well I just moved to Colorado and don't have flea issues anymore but we moved from South Georgia and struggled with fleas for a long time
My girl actually is allergic to fleas so it was really painful in the beginning watching her not only scratch from fleas but from the irritation the allergic reaction was causing her as well. My vet put both my dogs on Comfortis, which is a nice alternative to topicals. With the combination of Comfortis and doing my part to get rid of the fleas we never had a problem again.
A few things you might try is vaccuuming more often and having yor house AND yard sprayed once a month (alternating between the two) for fleas. I invested in a Roomba (robot vaccuum) that I would run everyday to pick up eggs and larvae that were possibly caught in the carpet. Once a week you should wash their bedding and clothing too. The larvae CAN NOT be killed with anything so you have to vaccuum them up or wash them away before they hatch into adults. Its difficult breaking the flea cycle but once you do and keep them on a preventative its worth the work
