I would also get with the diaspora of whatever country, esoecially doctors, nurses, clergy, famous actresses, sports figures..well also those in the country and have them contact all they could..giving explanations of what was required to save their lives.

Bark orders and clap hands. Have whistles and bullhorns. It is your first line of defense. If there is internet take pictures and videos and ask advice. I have barked orders before and will again if needed