Depending upon volcanic eruptions, the Big Island of Hawaii may experience issues with volcanic gases, which is referred to as vog. One of the gases is sulfur dioxide, which can be an irritant and potential health hazard.
To check for the current vog information, concentrations, forecasts, etc, to to this Hawaii Interagency Vog Information Dashboard.
For a general overview of vog, see our page — What you need to know about vog in Hawaii.