After several days of heavy rain and storms, another atmospheric shift is headed for Texas — this time, a plume of Saharan dust. The dust, drifting westward across the Atlantic, is expected to bring hazy skies and reduced air quality to parts of the state in the coming days.

A vast cloud of Saharan dust—nearly the size of the lower 48 states —is making its way across the Atlantic and is expected to blanket the southeastern U.S. this week, creating hazy skies, higher temperatures, and lower air quality.

The highest concentrations of Saharan dust will affect Florida on Wednesday and Thursday, but lighter concentrations may affect Texas by Friday.