To qualify for a Pag-IBIG calamity loan, you must be a member in good standing and have made at least 24 monthly contributions. Additionally, the calamity must be officially declared by the government, affecting your area. It's important to prepare the necessary documents, such as proof of identity and the declaration of calamity. For more detailed eligibility criteria and application procedures, it's best to check the official Pag-IBIG Fund website or contact their customer service for assistance.