With Hurricane Harvey set to cause historic flooding in Texas, the conspiracy theories have already begun.
Groundless of course. Hurricanes happen quite naturally. What they don't do is happen every year with the same intensity, or in the same place. There has not been a storm like this in this location since Hurricane Ike in 2008. Ike was a category 2, Harvey is forecast to possibly make landfall as a category 3.
The occasional and random nature of hurricanes has two effects. Firstly people forget, or new people move into the area, and so the lessons of the past are not applied, and people die. Worst case forecasts are valuable for when the worst case occurs, but since it does not always occur then people get the false idea that the dire forecasts are always wrong, this time it looks like they will be right.
But it also gives fuel for conspiracy theories about the path and intensity of the storm being engineered. We will see more of these over the next few days. But they are baseless. The reason why we know what the storm is doing is because we can model it. Long term models vary, but the storm is not doing anything unexplained. No "weather modification" explanation is called for here. It's just a major hurricane.