A catastrophic event occurs involving a bridge collapse, resulting in a multiple-car pileup with numerous fatalities and casualties. Emergency responders arrive at the scene, which includes patients with various injuries, including fractures, chest trauma, burns, and mass casualties. Among the injured, a pregnant wo man with a history of female genital mutilation (FGM) is about to give birth. Considering the scenario described, what should be the priorities in triaging patients at the scene of the disaster?