Really depends where am I at the moment. In my current location we have house, land in a town with not too big population and without strategic objects (meaning less likely to be bombed). It also has small and strong enough cellar that could withstand normal (non-nuclear, no bunker busters etc) bombing simply due to how physics work (close, hard walls meaning debris would more likely distribute weight over it, instead of breaching). It's small space means we couldn't last there long if stuck, though. We've some of the usual farming tools on hand too, good for, well, increasing the production and in case you need an improvised melee weapon.
If we end up on the neighboring continent, odds are we would also likely have there a house with land there. Likely no cellar, since those are rare there. But then again we would be far enough from both capital, strategic objects and large populations to not attract attention of hostile bombing much. Similarly again own land and equipment means we could grow our own food and too some extent defend it to lowly armed threats.
Now getting better weapons again depends on country. In EU it's mostly sh*t, you have to do a ton of bureaucracy to get a meager handgun and even for that you are limited in how much you are allowed to modify it. Similarly hunting guns also require all the paperwork.
In Asia it's a bit better. In one of my previous places where I lived a bit, in PI, you were allowed to buy, own, carry etc any bows, crossbows etc without any papers. That includes all the fancy, pricey automatic crossbows with full optics and so forth. In PI they are also more lenient about the gun permits if you live in a bad neighborhood (then again better don't live there in the first place) and those neighborhoods might also have friendly neighbors who've actual combat experience due to having butcher communists off their property.
Now IF I could buy whatever equipment for combat, I would probably get something for sniping (but with reasonable mag) and a simple mortar for when you need that extra punch. Both aren't actually that expensive, the only problem is always the sh*tty human governments and their monopolies on weapons (which they enact through laws). Then again governments sometimes vanish when big crisis hit.
When it comes to natural disasters, those are highly unlikely in EU, much more likely in SE Asia. But the difference is in SE Asia people normally are more prepared for those.
I'm also very unlikely to suffer from flood, because I don't own lowlands properties anymore and I don't think I would ever consider buying properties with obvious risks of flood. In fact, I would even profit from global warming if it would happen, since it would obviously increase the value of my property (due to capital flooding, being relocated etc). Unfortunately I do not own any private jets, so I can't contribute much to the global warming myself.
Forest fires also unlikely to ever be a problem, too far out.
Draught perhaps, but that and famine is why normally people should stockpile food supplies, which I hope we will improve on in future.
When it comes to alien invasion it also depends on the nature of the aliens. If they can offer better governing I would probably side with them, since statistically the majority of unnatural human deaths are caused by other humans, so humans are the true threat to humans.
