Which natural disaster isn't mentioned in the text?

Part I.
1.Which natural disaster isn't mentioned in the text?
A.a rolcano   B.a flood    C.a hurricane    D.a tornado
2.What is his unforgettable personal experience?
A. the Lon Don Killer                 B.the heavy fog in Lon Don in 1952
C.the strangeness of nature     D.a high- pressure system
3.How long did the Lon Don Killer Fog last?
A .for four days            B.for five days
C.for six days                D.for a week