Residents of the southwestern United States are facing a new threat as Tropical Storm Hilary moves north towards the region, bringing heavy rainfall and potentially "life-threatening" flash flooding. California Governor Gavin Newsom has declared a state of emergency in response to the storm, which made landfall Sunday in the northern part of Mexico's Baja California. Wildfires have left burn scars in the region, making it particularly vulnerable to flooding. A tropical storm warning has been issued and residents are urged to take necessary precautions.
