Things are really starting to heat up in Antarctica.

The weather blog Weather Underground reports that temperatures at Esperanza Base — on the northern tip of the Antarctic Peninsula — hit a record-breaking high of 63.5°F (17.5°C) on Tuesday, Mar. 24.

Just a day earlier, temperatures at the nearby Marambio Base had reached 63.3°F (17.4°C).

Prior to these two days, the hottest temperature ever recorded on the continent was 62.8°F (17.1°C), on April 24, 1961 (this was also at Esperanza Base).

The records are not yet official, however. According to Weather Underground,

“The World Meteorological Organization—WMO—has not yet certified that this week’s temperatures are all-time weather records for Antarctica, though the Argentinian weather service has verified that the temperatures measured at Esperanza Base and Marambio Base were the highest ever measured at each site.”

But regardless as to whether they become official records or not, last week’s remarkably high temperatures in Antarctica are just the latest example of the effects of global warming.

A study published last week revealed that the melting of Antarctica’s floating ice shelves has been accelerating, leaving the shelves nearly 20% thinner than they were two decades ago.

According to the British Antarctic Survey, temperatures in the region have risen an average of about 5°F (2.8°C) over the past 50 years.

Read the original story from Time.