Speaking of dreams whats this about?

I usually have the constant dream of my kids and I keeping trapped in my car and water is surrrounding us I keep trying to get to my kids who are belted into their seats but can't this reoccurs... Do I have a fear of this and not realize it though on a day to day basis I dont even think about it .. The other i had last night Myself and a bunch of other people were being held on this like building made of metal up over a huge ocean. All I remember is running and jumping onto this metal contraption and holding on for dear life and this people I didn't know called my name telling me to hold on as I looked over the ocean and noticed there was no land or anything I started to loose my grip when I fell in and this person jumped in after me while screaming my name and I awoke. It's weird though I have no fear known to water I don't understand my dreams does anyone..???