So I think they/you are saying is grab the sand bags and open the flood gates because it looks like a derecho storm is close at hand.
A derecho (/dəˈreɪtʃoʊ/, from Spanish: derecho [deˈɾetʃo], "straight" as in direction) is a widespread, long-lived, straight-line wind storm that is associated with a fast-moving group of severe thunderstorms known as a mesoscale convective system[1] and potentially rivaling hurricanic and tornadic forces.