The world will not end because biblically God is in control of that occurrence.
Isaiah 65:17 For, behold, I create new heavens and a new earth: and the former shall not be remembered, nor come into mind.
Revelation 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
But I do not rule out some major catastrophies may occur.
Genesis 1:14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for SIGNS, and for seasons, and for days, and years: