I'm not prone to nightmares (except if I happen to watch a zombie movie. "Zombies, man. They creep me out." - Dennis Hopper 'Land of the Dead')
Apart from that, in fact, I hardly/rarely ever have them, but I have had instances of 'dream vision' or Clair-cognizance if you will, where something I had dreamt (be it good or bad) has come to pass sometime thereafter. I've had enough things 'dreamt and come to pass' to know that I'm not going off the deep end. And the dreams are / have not only been about people close to me either.
I've dreamt of people I haven't even met. The good thing about it though is that, for each dream I've had which I suspected was 'not of the ordinary', I'd make sure to tell at least one other person about it. Thus, when said incident then thereafter happens, someone is there to confirm that indeed, I had mentioned about dreaming of it BEFORE it happened.
Lately, past year or so, I've dreamt of Tidal Waves. At least 5 times in the past year since 2012, I've had such dreams. Albeit I think these Tidal Wave dreams are probably more related to the emotional than anything that's destined to happen (i.e.: world event Tsunami).
A dream I had more recently, well back in May this year, was rather usual (for me). Different than what I have usually dreamt about.
In the dream I was some sort of sorceress. I cast my hands up towards the inky, blue-black night sky and low and behold lightning bolts emitted from each of my finger tips.
The bolts electrified the stars and shook them lose from their night sky blanket, and they began to fall. Millions and millions of stars rained down upon the earth.
We (myself and whomever else were present) had to take shelter, because as the stars fell they struck us and we discovered that they were like tiny ninja stars, sharp enough to do damage, albeit minor.
* * *
Ah dreams! So thrilling and exciting. Like a movie of the mind. I count myself lucky to remember as many/so many dreams as I have over my lifetime so far.