Due to the warming of the ocean water around the equator, the coral reef in Okinawa is being damaged.
ご質問ありがとうございます。
"Due to the warming of the ocean water around the equator"=「赤道付近の海水の温度が上昇したことにより」
"the coral reef in Okinawa is being damaged."=「沖縄のサンゴ礁が被害を受けています。」
Example in context:"The coral reefs in Okinawa are at risk, because the ocean water's temperature is rising."
ご参考になると良いです!