The blanket of foam came as the result of Tropical Cyclone Oswald, which recently produced high winds, small tornadoes and extensive flooding on the east coast of Australia. The storm required thousands of people to be evacuated from their homes.
According to the National Oceanic and Atmospheric Association, while sea foam formation can vary by region, it's generally created by wind and waves churning up organic matter in the ocean. Decaying algae offshore are also often a major contributor.
Though the foam is not considered hazardous to humans, it's not entirely without health and environmental effects. For example, the association explains, when a certain type of algae blooms along the Gulf Coast, toxins from that algae can became airborne and irritate people's eyes and the respiratory systems of people who suffer from asthma.
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