Extreme weather Resources during severe weather, including excessive heat and winter weather conditions. Code Blue When it's very cold, the City acts to keep people who are homeless safe. Code Red When it's very hot, the City provides additional services for people who are homeless. Find a cooling center Locate a public air-conditioned space during a heat health emergency. Heat health emergency You can call the Heatline or visit a cooling center during a heat health emergency. Report a dog left outdoors in extreme weather Dogs must have adequate shelter during extreme heat and cold.