We corralled the water using water-wicking cloth tubes (QuikWick) and putting a utility pump inside to drain out the water flowing in. (Once every 4 years or so we'd see a teenie puddle of water in a corner but never anything like this.)
Our gutters are good and they drain away from the house. We don't see any cracks and the walls don't have efflorescence that we can see.
Incidentally, most of the neighbors also had problems who had never had problems before as well. (Most neighbors do not have sump pumps/ drains either.)
We called some basement waterproofing companies and their solution is French Drains with a sump pump. We gave one company a deposit for a French Drain system but are now having second thoughts. I'm concerned that adding an interior trench, making weep holes in the cinder block and digging a sump pump ditch will be inviting in water regularly to keep up with when I only had a problem once. The contractor agreed to do it without the weep holes, if we'd prefer it that way. I'm getting concerned about the whole thing. I have already purchased a battery backup sump pump as well.
I'm afraid we're going to be inviting in water that would otherwise not come in and be dependant on the sump system to remove it.
A contractor I had here for another project, (not a basement water contractor), suggested to drill a small opening in the basement floor and see if there's gravel underneath. If there was then there was no need for the trenches and we could just do the sump pump. We tried to drill a hole but the floor is really hard and we couldn't make any progress with the masonry drill bits. If there was gravel under the basement cement floor would the sump pump work without the french drain part?
I'd like to get input from people more familiar with this.
Is this all overkill for a one-time occurrence or is a French Drain system the right plan?