On the one hand, old shelter signs are often outdated and may not provide the best protection from modern nuclear weapons. For example, many old shelters were designed to protect against the relatively low-yield atomic bombs that were used in World War II, but they may not be as effective against more powerful modern nuclear weapons. Additionally, many old shelters are not properly maintained and may be in disrepair, which could make them unsafe in the event of an emergency.
On the other hand, taking shelter in any type of sturdy building, even an old shelter, may offer some protection from the effects of a nuclear blast, such as flying debris, heat, and radiation. If there is no public bomb shelter readily available, an old shelter can still provide some level of protection compared to being completely exposed to the blast.
Ultimately, the decision of whether or not to heed old shelter signs in the event of a nuclear attack is a personal one. Individuals should evaluate the specific shelter they are considering, assess the level of risk they are facing, and make an informed decision about whether or not taking shelter is the best course of action. In any case, if there is an imminent threat of a nuclear attack, it's always advisable to seek information from official and up-to-date sources such as civil defense authorities or relevant emergency agencies for proper safety instructions and protocols for your location to ensure adequate protection and response.
