Learn English: Sad News for Coral Reefs in Australia! (easy)

Imagine the ocean getting super hot; that's what happened to Australia's amazing coral reefs.

The warm water made the coral really sick, causing them to lose their bright colors – it's called bleaching.

Many beautiful reefs, even those that were healthy before, have been affected by this heat.

Scientists are very worried because these reefs need a long time to get better, and more heat waves are coming.