The cruise conglomerate also faces disruption due to Carnival Cruise Line ship Carnival Vista having to cancel three sailings in July for repairs due to a mechanical issues.
Shares fell by 8% late last week, while its annual earnings guidance was cut to $4.25-$4.35 adjusted profit per share, down from a previous estimate of $4.35-$4.55.
Second quarter profits fell to $451 million from $561 million compared with the previous year as revenue increased to $4.8 billion from $4.4 billion.