The energy from subterranian watercourses can also interact with the energies of each of the energy grids AND hence our own Life force or Prana.

Where sleep is disturbed from this influence alone, we get issues of waking up feeling drained, lethargic & poor energy all day. Sleep does NOT refresh for these folk. 

However it is possible for very dangerous places to be sleeping in. They are where two water veins intersect, or/and where water intersects with the Curry grid OR indeed with the Curry line on top of the Hartmann, and the water veins as well, as overlays.

I once had a 'death-defying' health disturbance by sleeping over this sort of combination energy for 2 weeks about 6 years ago.
I just could NOT get comfortable. For 5 days I tossed & turned constantly. Then on the 6th night I got a MASSIVE DOSE or Diarhea WITH Pain, Bloating, AND shakes & Shivers…. Literally 'I-thought-I-was-going-to DIE'!!!
I later learned that the man who once lived there, AND slept in the same location, DIED OF AGGRESSIVE PROSTATE CANCER!!

Hmmm, makes-you-think.

After 2 days AND nights of feeling 'near-death' IT FINALLY 'dawned upon me'… Shift your Bed, Glen!!! A shift of only about 1.4 metres SAVED-MY-LIFE.(I* jest* not*) 
So, in part, I now can countenance the absolute-terror of what it must be like for those poor souls who die of diseases such as Cholera & the like…. Horrible.