While we're enjoying tropical weather here, it is getting really stupid cold elsewhere in U.S.. At -40 °F, you probably don't want to go out without the proper clothing to protect yourself.

At such temperatures, you will be able to feel the cold in your lung-tubes and in the air sacs and it would be very difficult to take deep breaths of air this cold without reflexively coughing.

The effects of global warming?

Winter is already here.