Tourists on an excursion boat watch a humpback whale swim in the Ilulissat Icefjord, Greenland on August 4, 2019. Summers have become longer in Ilulissat. The unseasonably warm weather has extended the summer tourist season this year. /VCG Photo

As the Earth's climate warms, dogs used for pulling sleds during the winter stand chained in a compound on the outskirts of town in Ilulissat, Greenland. /VCG Photo

In this view from an airplane, silty meltwater coming from the Greenland ice sheet meets clean water in a lake near the Sermeq Avangnardleq glacier on August 4, 2019, near Ilulissat, Greenland. /VCG Photo

Climate change is having a profound effect on Greenland. The heatwave allows fishermen a wider period to fish from boats on open waters but long term benefits are uncertain, as warming waters could have a negative impact on the local fish and whale population. /VCG Photo