According to Think Progress, "studies suggest that women die at a rate up to 14 times higher than men, boys, or even girls when disaster strikes". Part of the reason is because women are more impacted by social and cultural traditions that limit their mobility.
After an earthquake in Maharashtra, India the deaths among women were attributed to the fact that women were mostly in their homes while the men were out working in the fields. Being out allowed the men to be less susceptible to being trapped underneath rubble. A study of the cyclone that hit Bangladesh in 1991, suggested that several women and children died in their homes because they waited for the men to come home in order to make evacuation decisions.
The issue is that many women are not aware of how to protect themselves and are often left out of the planning process in order to be prepared during emergencies.