The concentration of the heat-trapping gas topped 420 parts per million, while the planet has warmed more than two degrees. This is the highest daily average concentration to be recorded. Data was collected at the Mauna Loa Observatory on the Big Island of Hawaii.

From Jan. 1 through Friday, Hawaii has set or tied 281 record high temperatures at official Weather Service stations located at four island airports ― in Honolulu, Hilo, Lihue and Kahului.

A blob menacing Hawaii is now visible from space. A massive heatwave in the Pacific Ocean is killing off coral. Satellites are capturing the destruction so that scientists can learn how to rebuild the reefs.

East Island, a strip of gravel and sand northwest of Honolulu, "appears to be under water" after Hurricane Walaka surged past Hawaii, officials said.

The total amount of rain, measured in feet, soared to historic levels: Over four feet or 52.02 inches were measured on Mountain View, about 15 miles southwest of Hilo.

Researchers from the Coral Reef Ecology Lab at the Hawai'i Institute of Marine Biology documented the third global bleaching event as it occurred from 2014 to 2016 at the Hanauma Bay Nature Preserve (HBNP) on the island of O'ahu, Hawai'i. Their findings, published in the international journal PeerJ, show that temperature is by far the most influential factor in coral bleaching at this well-managed location where corals, fish, and all other organisms are protected.