Hi, there!
Just to share a few thoughts that come to my mind after reading through your posting:
1. Your house seems to be located on an old dried up lake bed that gets re-charged whenever there is a heavy downpour.
2. Fortunately, the water does not get piled up around the house, since it appears that the foundation of the lake bed is alluvial in nature and so does not trap the water in the upper layers, it simply flows back into the natural drainage path, easily.
3. However, in the present instance, the pervious alluvial soil itself got thoroughly saturated due to the excessive and heavy downpour.
4. Consequently the Ground Water Table must have risen so high.
5. Depending upon the permeability of the foundation soils - which seems to be fairly high - it takes some time for the surroundings to dry up and stabilise once again.
6. As far as the building is concerned, it is of utmost importance to see that the internal woodwork does not get into contact with any form of water - be it seepage or leakage, for water and wood cannot stay together - unless the lumber is of an exceptionally good quality and is well-seasoned.
7. What is important, therefore, is to thoroughly check the source(s) of such water contact points around the perimeter of the house. Fundamentally at stake is the Damp Proof Coursing arrangements that must have been made at the time of raising the house in order to guard it against the risk of seepage creeping into it from any foundation source, particularly in times of high flooding of the surroundings.
8. Once the source is identified, necessary remedial measures can be thought of and implemented.
9. Meanwhile, it won't be a bad idea to lower the Ground Water Table (GWT) by arranging a few pumps around the perimeter of the house and drain the excess water out to far-flung areas. This would accelerate the drying process.
10. Once the GWT is lowered, the potential/identified sources of the seepage should be treated immediatey so that recurrence of this problem is eliminated the next time there is going to be a heavy downpour.
Regards and Best Wishes.
PLAN