It’s a culturally sanctioned holiday, at least, an excuse to grab the portable speaker and some friends, and finally — finally! — eat outdoors.

Stratospheric polar vortex changes still trigger brutal U.S. winter cold snaps and extreme weather despite a warming climate.

You job as a rescuer is to rewarm the person and do CPR if indicated. A hypothermia victim is never cold and dead only warm and dead. During severe hypothermia the heart is hyperexcitable and ...