There is a product called Zotal that can be used effectively and quickly for flea removal and control. It can be bought on-line.
This past summer I went to vacation in southern Spain at my grandmother's cottage. Fleas are in the soil. It is not necessarily a moist region. However, my cousin had just moved some dogs he was keeping in an old chicken coop on a terrace next to the house, not kept in the best conditions. Well on the second day of our vacation we went up to see the "era" as those plots of lands are called and later found out that we were attacked by fleas. I was totally bitten later to find out I was extremely allergic and had to go urgent care. However, I was told by the pharmacist and later many other people to use Zotal to take care of the ones in the house without resorting to more harmful chemicals as I had a newborn. Apparently, fleas were a big problem when people kept their mules, donkey, and horses in corral's next to their homes up until 40 years ago. Zotal was used to get rid of them. It is still used for that purpose. Following their instructions in a pail of water you add a capful of Zotal. A little goes a long way. With gloves, use a rinsed cloth and go over your couches. Mop all the floors. With that same mop water wash your areas outside your doors, patios, basements...with a broom. Fleas stay away. You can even sprinkle/shower the water over things. Stay away for four hours at least. Fleas inside dead. ,
My cousin fumigated the "era" two times while we were there. My husband spread DE the last week we were there and as he was coming down from the era covered in DE, he was also covered in fleas. He stripped out in the street and ran to the shower, but he still reintroducd them inside the house. I cleaned the house and the linens three times over our month long vacation, and I could tell by the dead fleas on the floor that the Zotal was the best thing for the house and my sanity. DE is great. We use it at home for our chickens, rabbits, and home, but sometimes you need something that works right now, especially when you are severely allergic, have kids, and a new baby.
My grandparents used Zotal successfully. Interestingly, they also used native tortoises in their stalls to control fleas. Apparently tortoises love to eat the buggers. Also fleas flare up in conditions were there is lots of manure, so keep your animals beds clean and poop free. Fleas are not minor problem.