The dust turns skies around the northeastern Caribbean Sea hazy, reducing visibility and causing poor air quality. Saharan dust blows across the Atlantic a few times most summers, sometimes reaching southern Florida. Dust storms and rising warm air can lift the fine Saharan sand 15,000 feet or so above the African deserts. Winds carry the dust westward.
Larger particles fall out as the dust crosses the Atlantic.
But the smaller particles can cause problems an ocean away. Bathing Suit Season will be here before you know it.