We bought a brand new house that had a structural floor because of the clay soil. It was all wired for a sump pump with a barrel and all. I was finishing the basement and pulled up the trap door. The sump hole was full of water and I noticed an outlet on the wall with no cord for the sump. The builder had put a sump in for inspection than pulled it and put it in another house. They had to dig the dirt out under the floor an extra 2 feet and bring in new dirt then put a liner through the whole area. No mold was detected.
If I was the OP I would just let the water flood in and pump it out when the rain stops. It's not like the house will sink or anything.
If I was the OP I would just let the water flood in and pump it out when the rain stops. It's not like the house will sink or anything.