The human being is highly subestimated. How many times was this race close to disapear in the past? our race has survived thounsens of year and as long as there is not any big war I believe we will keep existing for ever.
You talk about natural disasters, those dont happen in the hole world, for instance were I live the worst thing is a one meter high flood 6 times a year or less. That if you live close to the river, which I dont so I dont see nothing more than the rain.
What is more, the tecnology makes this disasters less hazardous since we can deal with them slightly better, like the earthquake proof buildings.

Humans will survive till the end of the days in my opinion as long as there is hope

Off topic: Dont discuss with other clans or u will make me angry e.e, we already have problems with the clan called LuCK cause I kicked someone for inactivity and I dont want enemies