![]() Scientists with NOAA this week raised their coral bleaching warning system to Alert Level 2 for the Keys, their highest heat stress level out of five. "The corals are pale, it looks like the colour's draining out," said Lesneski, who has spent several days on the reefs over the last two weeks. ![]() Climate Barometer newsletter: Sign up to keep your finger on the climate pulse.The corals should be vibrant and colourful this time of year, but are swiftly going white, said Katey Lesneski, research and monitoring coordinator for Mission: Iconic Reefs, which the National Oceanic and Atmospheric Administration launched to protect Florida coral reefs. Some Florida Keys coral reefs are losing their colour weeks earlier than normal this summer because of record-high water temperatures, meaning they are under stress and their health is potentially endangered, federal scientists said.
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