Yes, the sentence has a singular subject (one tragic effect), and a singular verb (massive flooding.)
yes
Not unless your are talking about a specific hurricane like "Hurricane Katrina".
Everyone either gets flooded and die or they go away when they here that a hurricane will come to KILL them ALL!
No, except at the beginning of a sentence because it is not a proper noun.
The first sentence uses the word catastrophe literally, as a declarative statement. The second sentence is also a valid sentence, but not with a literal sense of the word catastrophe (unless the backpack contained a flask of a life-threatening toxin which broke upon falling to the floor). It uses catastrophe as a metaphor, as hyperbole, and as a melodramatic statement of someone self-centered and unaware of the world.
The hurricane destroyed my hometown.
The eye of the hurricane is the center of the hurricane.
i highbernated during hurricane sandy
Example sentence - We left our vacation home sooner than we planned due to the hurricane forecast.
There was a huge hurricane in Las Angeles
yes
Example sentence - They were worked into such a frenzy over the flooding of the valley.
...and servire flooding was thought to be the cause of all the problems with the transport of goods.
My friends and I made an agreement.
It is wise to avoid the North Atlantic during hurricane season.
Phoenix has experienced abnormally heavy rainfall this year that has caused frequent flooding of streets and parking lots.
I hope my insurance company covers this severe flooding.This arroyo is subject to intermittent flooding.