1. involving or causing a sudden violent change or disaster

Examples

• The earthquake had cataclysmic effects on the entire region.
• Climate change could lead to cataclysmic flooding in coastal areas.
• The stock market crash was a cataclysmic event for investors.
• Scientists warn of cataclysmic consequences if the asteroid hits Earth.
• The war brought cataclysmic changes to the country’s political system.
• The volcanic eruption caused cataclysmic damage to nearby towns.