In 1953, John Wyndham published a frightful story titled The Kraken Wakes. Borrowing from Alfred Lord Tennyson's famous poem, "The Kraken", Wyndham's book is a horrific end of times narrative.
It speaks of Planet Earth under assault by frightful creatures from the deep sea. Earlier, in 1951, Wyndham had issued The Day of the Triffids, in which people on Planet Earth are blinded by poisonous rain, caused by creatures from outer space.