Fleas how do I kill these things?

I have my dogs on advantix and trifexis. My neighbors yard dog (NC) died. Now hundreds of fleas are in the yard and traveling inside. I know my dogs ate the trifexis and digested it. Still there are fleas. I have used spectricide with triazicide in the yard (the granules). I did wet it according to instructions. This is week 1 after treating the yard the pets and the house. What can I do to make this madness stop? P. S. I have had my dogs on advantage until last month, so it was not a failure of preventative on my part. The advantix was a double dose I dose per weight 2 weeks apart. I am losing my mind with these horrible fleas. I am mostly interested in yard treatment because the spectricide is not putting a dent in these buggers. I know the fleas came from the neighbors pet because the attack of killer fleas came three days after his dog passed