Sea snakes may be lurking in foam covering storm-lashed Australian beaches

Health-wise it's probably not great to let your kids play in it,' lifesaver says

• Thunderstorms forecast to batter NSW coast as flooding and wild weather continue

People are being warned to stay out of sea foam that has appeared on the beaches of northern New South Wales and Queensland in the wake of severe storms this week, with sea snakes and hazardous material hidden in it.

Storms have lashed the two states, bringing heavy rain, flooding and coastal erosion. The foam is formed by the churning of seawater with algae, salts, fats and other pollutants.