Yes and no. Whether you can safely stay insides during a chemical emergency or hazardous event will depend on the shelter, your environment, and the situation.
The purpose of a safe haven, blast-resistant-building, or shelter-in-place is to keep you safe. At a facility, such as a processing plant, a chemical release or blast can cause severe health effects.
A safe haven or refuge chamber is a sealed environment, in which you can take shelter during a hazardous event when evacuation is not possible.
Shelter-in-Place (SIP) is used in emergency response actions plans and refers to the process of taking refuge by staying indoors and sealing your environment.
A blast-resistant building (BRB) is a reinforced structure designed to reduce harm to personnel and equipment in an accidental or deliberate explosion.
Methane Shut-Off System and Detection for Tunnelling Refuge Chambers installed in Egypt.