A health care facility must develop a comprehensive disaster plan that has a provision for critical care services. Mass critical care requires surge capacity: augmentation of critical care services during a disaster. Surge capacity involves staff, supplies, space, and structure. Measures to increase critical care staff include recalling essential personnel, using noncritical care staff, and emergency credentialing of volunteers. Having an adequate supply chain and a cache of critical care supplies is essential. Virtual critical care or tele-critical care can augment critical care capacity by assisting with patient monitoring, specialized consultation, and in pandemics reduces staff exposure.