Americans told to avoid coffee during extreme heat warning in 3 states

Americans are being advised to avoid drinking coffee in three states where "extreme" temperatures are being forecast this week.

The National Weather Service in Las Vegas issued an extreme heat warning for Wednesday and Thursday in portions of California, Arizona and Nevada.

A social media post from the National Weather Service included a "do" and "don't" graphic.

THE OPTIMAL TIME TO DRINK COFFEE ISN'T WHEN YOU NORMALLY HAVE IT

The National Weather Service encourages people to stay hydrated...