Thursday and Friday mornings are expected to see some extremely hazardous weather conditions with 37 states and more than 90 million people under alert. Heavy and brutal snow and winds are expected to create extremely cold conditions, making the outdoors extremely dangerous. Close to 2,100 flights were canceled within the U.S. due to weather conditions by Thursday night alone.

In a storm advisory released by New York Gov. Kathy Hochul, travel was prohibited and advised against in several parts of the state. “Areas in Western New York and the North Country are already experiencing lake effect snow and we’re anticipating up to six inches of snow in Downstate regions between tonight and tomorrow morning,” said Gov. Hochul regarding the hazardous weather conditions in the state.

Earlier this week, weather conditions left people on the highway in Virginia for more than 24 hours. In the same week now, a winter storm is headed towards the Interstate 95 corridor, with 3 to 6 inches of snow expected to fall. New York City, Boston, and Philadelphia are all about to see several inches of snow, making it the first significant fall of the season.

“I’ve declared a state of emergency as Virginia prepares to respond to another large winter storm beginning tomorrow.

These back-to-back storms will generate landmark winter weather that requires extra flexibility—particularly as many continue to deal with power outages.” tweeted Gov. Ralph Northam of Virginia, warning drivers and people who use public commuting to refrain from the outdoors, especially from the heavily covered roads.

Even Gov. Andy Beshear of Kentucky declared a state of emergency, advising people to take precautions, “We are urging Kentuckians to stay off the roads if possible. The weather we are continuing to see across Kentucky is dangerous.”

Several schools already announced to cancel classes on Thursday before conditions could be determined for Friday as well. Boston and Nashville are also under a harsh winter storm warning for hazardous weather conditions so people can be cautious. Several areas are advised to take heed of the snow and wind storm that is expected to go on from Thursday, continuing overnight until several hours on Friday.