When should immediate action shelter be used?

Immediate action shelter is specifically designed to be utilized in situations where there is an urgent need for shelter. This could arise due to sudden changes in weather, environmental hazards, or the need for protection from the elements in a timely manner. The term "immediate action" implies that there is little to no time to prepare or build a more permanent structure, making it clear that the need for shelter is pressing.

In circumstances when you have time to build or the weather is manageable, other forms of shelter could be constructed that offer better protection or comfort. Options like waiting out the rain or extreme temperatures may allow for more comprehensive planning, which does not align with the concept of "immediate action." Hence, the choice that emphasizes the urgency of needing shelter right away is the most appropriate and aligns with how immediate action shelters are intended to be used.