Waterproof flame retardant fabrics are also available to make coats and leggings for staff to wear over their overalls.
The majority of rainwear will be tested to the limited flame spread standard EN533. Under this standard the fabric will cease to burn within 2 seconds when it is removed from the flames but hole formation is permitted.
It is therefore imperative that fully rated flame retardant clothing is worn under this kind of rainwear otherwise the clothing underneath may catch fire and cause burn injuries to the wearer. Some coats will have a liner inside them, this will need to be made from flame retardant fabrics, these jackets will then meet the EN531 standard and normal cotton garments can be worn underneath.