OFWs can apply for a Pag-IBIG calamity loan by submitting the necessary documents to the Pag-IBIG Fund. This typically includes proof of membership, a valid ID, and any relevant documents showing the impact of the calamity on your finances. It's important to check the specific requirements and application process on the official Pag-IBIG website. Remember, the approval and amount of the loan are at the discretion of Pag-IBIG, so be sure to provide accurate information and seek assistance if needed.