Even if there was a watertight door, it would be of no use to me.. As mentioned water come up through the joints and cracks in my basement slab.. I live about 150' from a canal, and about 400' from a lake...
The water table has been unnaturally high recently... I've seen was entering my basement just from a tidal surge without any rain...
In the past week we've had 3 storms here dumping about 5in of rain.. last night. This is what I'm dealing with right now. Two sump pumps (plus a spare).
My house is 113 years old, and has some questionable construction.. note though that the builder constructed a raised platform for the boiler (steam heat) so they were aware of a ground water issue back then..
