As Hurricane Helene approaches, meteorologists are closely monitoring its potential path and impacts, particularly due to the rare Fujiwhara effect. This phenomenon could lead to significant rainfall and wind changes, especially in North Carolina and the Midwest. Experts warn that Helene may trigger massive inland rainfall, resulting in major flooding in the southern Appalachians. Although Illinois might be significantly affected, forecasts suggest that Canada is likely to be spared from the storm's worst effects. The unique interactions generated by the Fujiwhara effect could alter Helene's trajectory, making it a critical factor to watch in the coming days.