plane crash dreams

i have had two dreams in the past couple months about plane crashes..i was not on either plane..just saw the crash..one was on land the plan hit a building and fell to the ground on take off..the other was on a lake..also very close to take off..the plane fell to the lake and when it landed me and some of my family went out on boats to help people..in the first one there was a few deaths and in the second there was none