See, the LORD is going to lay waste the earth and devastate it; he will ruin its face and scatter its inhabitants— it will be the same

for priest as for people,

for the master as for his servant,

for the mistress as for her servant,

for seller as for buyer,

for borrower as for lender,

for debtor as for creditor. The earth will be completely laid waste and totally plundered. The LORD has spoken this word.
The earth dries up and withers, the world languishes and withers, the heavens languish with the earth. The earth is defiled by its people; they have disobeyed the laws...

God was destroying the earth for a reason - because the people were sinful. Were not much better today. We need to be careful to do good lest we encounter God's wrath.