Though the City of Houston declined to open warming centers during this week's cold snap, several nonprofits are offering resources for Houstonians in need. The big picture: Overnight temperatures must reach 24 degrees (or 15 degrees with a wind chill) for at least two hours for the city to open the centers,

The city only opens warming centers when temperatures dip to 24 degrees for at least two hours. Instead, the Mayor’s Office of Public Safety and Homeland has been coordinating with private facilities.

Several shelters and warming centers are open in the Houston area Tuesday and Wednesday as a winter storm continues to bring freezing temperatures to Texas.