Having seen dust storms come and go over the past 75 plus years, I can't comprehend the fuss the Media have stirred up . That's worse and causes more havoc and concern than the dust storms, polluting minds with fear, but maybe that is the Media's role. I recall about twenty years ago, talking with people in Kiwi land about australia's dust storms, a new Zealander said "we certainly know when you have had a dust storm in Australia, it arrives here {in NZ] about three days later"
And as for the potential problem with the run off from the rooves into the water tanks, past generations have lived all their lives with the dust residue in their tank water, which in many cases was the only source of drinking water, and we never became ill from drinking it. Maybe our immune systems were more immune living on good diets of simpler food.