I imagine that 100 years from now(or significantly less than that) the ocean water level will be several meters higher, large parts of the world will be unliveable due to heat waves and wars will be fought over food and water. I doubt our species will last another 1000.

I'm very confident our species will last longer than the next 1000 years. Our current civilisation, though, now that's a completely different story.

You might try spending some time reading predictions of doom and gloom from the past. It should be very reassuring.