Mayor Michael Hancock issued an emergency declaration for the city and county of Denver on Thursday in response to the surge of migrants who have arrived over the past 10 days. Since Monday, 247 migrants have made their way to Denver through various modes of transportation. Seventy-five arrived at local homeless shelters overnight — a time that Hancock noted puts even more pressure on the system because of the cold weather. Hancock reiterated at a news conference Thursday that the migrants and asylum seekers were coming either on their own or at the encouragement of nonprofit organizations at the border that have provided recommendations for places they can go without advanced notice.