Obama said at a Tuesday rally the country can't afford to have Trump continuing to ignore a pandemic that experts say will get far worse during the colder months.
As winter weather merges with many people moving life indoors, global health experts say wearing masks could save 100,000 lives from COVID-19 by January 1.
A winter storm with snow, severe thunderstorms and strong winds is moving into the central and southern parts of the country before it hits the Northeast later this week.
Winter Storm Gage has brought the post-holiday blues to parts of the Midwest and Northeast as strong winds and ice have snapped power lines and left thousands of Americans in the dark.
Large parts of California, including around Los Angeles and the San Francisco Bay Area, warned of heavy rain, snowfall, strong winds and potential flooding forecast for this weekend.
As the powerful winter storm leaves the Northeast, a new storm building off the West coast is expected to bring heavy rain and mountain snow in California and New Mexico.
A string of schools are closed or on a delayed opening schedule in parts of the Northeast, including in Connecticut, Massachusetts and Rhode Island in the aftermath of a severe winter storm.
The major storm system from the West has moved to the Northeast, with thousands of flight delays and cancelations causing severe travel disruption across the country following the Thanksgiving weekend.
Several parts of Arizona, including Phoenix and Tuscon, have been issued with severe flood and thunderstorm warnings, with wind gusts of up to 60 miles per hour expected.
Travel plans over the Thanksgiving period will be heavily affected by two major storm systems poised to sweep across the nation, moving through the West, the Midwest and the South.
Severe storm systems heading to parts of the Central states, and potentially spreading south and east, are predicted to cause major travel disruptions on the busiest day of the year for Thanksgiving holiday commuters.
Temperatures are nearing record levels, six to 12 inches of snow is predicted and dozens of schools are delayed in opening or closed
A winter storm warning is in effect across Central and Western New York with a cold front bringing record cold temperatures and snowfall of more than 12 inches in some parts of the region.
East Coast temperatures are expected to be 10 to 20 degrees below average as three rounds of cold air blast across the Northern Plains, upper Midwest and Great Lakes.
Bitter cold and strong winds hindered some athletes this week, but temperatures are expected to creep back up.
The weather phenomenon is also called "frost smoke."
The village's electronic thermometer, installed to showcase the town's famously wintry climes, reportedly broke after hitting -62 degrees Fahrenheit this week.
Temperatures across the northeastern U.S. are expected to be 20 to 30 degrees Fahrenheit below average this weekend.
The bomb cyclone was just the tip of the crazy weather iceberg.
They are as shocked by the cold as the rest of us.
The temperature in the barn where the animals were found reached -11 degrees Farenheit.
Let's break down the terms.