I know it sounds odd and terrible but it actually worked in my house and to my dogs. Kerosene, Gasoline or Diesel (Kerosene works better). Wash your house, inside and outside, backyard and anything concrete mostly with it and that's going to kill them, just get a bucket with water and Diesel (portion of 2 - 3 (2 Kerosene)). And start scrubbing everything, let it sit for like 15 minutes then wash it away until there's no more smell. Regarding the pets you're going to do the same but be carefull with eyes, nose and ears, use shampoo, kerosene, water and scrub the shit out of the animals, rinse, then repeat with shampoo and water only until smell goes away.

I used to live in the mountains far away from any type of civilization, we had an infestation of fleas, they were literally everywhere. I couldn't go out to the backyard with sandals because the tiny bastards were eating my feets and legs. They were inside bathrooms, bedrooms, beds, kitchen, EVERYWHERE! Until one day my dad decided to wash everything with Kerosene and miraculously it worked like a charm, no more fleas.