On Monday morning, a brush fire in Sorrento Valley, San Diego, prompted mandatory evacuation orders as firefighters battled the flames that spread rapidly. Initially reported at 9:20 a.m. near Sorrento Valley Drive, the fire expanded to an estimated 30 to 40 acres by 10:30 a.m. Evacuations were mandated for areas including East Ocean Air Drive, Abalone Landing Terrace, and Sea Pearl Cove, among others. Residents were urged to evacuate immediately and heed emergency personnel's instructions. An evacuation warning was also issued for the 5000 block of Sea Mist Lane, advising residents to prepare for possible evacuation. A temporary evacuation point was established at Mandell Weiss Eastgate Park for those affected. Authorities closed Sorrento Valley Boulevard between Vista Sorrento Parkway and Camino Santa Fe, advising motorists to avoid the area. Weather conditions included winds from the south-southwest at about 15 mph, temperatures near 69 degrees Fahrenheit, and relative humidity around 75%. Officials are investigating the cause of the fire, with reports of an explosion heard before it ignited.