High school skiers compete in the annual Lynx Loppet race at Kincaid Park in Anchorage. The park has 30 miles of trails, but competitors were limited to a mile-long loop of man-made snow.

As the climate warms, recent winters in Anchorage, Alaska, have seen more ice. The trend is leading to safety concerns and new measures to cope in this city where winter is defined by snow.

(Image credit: Nat Herz/Alaska’s Energy Desk)