Blood shortage in Mumbai has become critical during the Diwali holidays, with many blood banks reporting a scarcity of blood packets. Routine surgeries may need to be rescheduled due to the lack of blood. Many patients' relatives are actively searching for blood, but most blood banks do not have any to spare. The city is facing a deficit of blood, with an estimated daily need of 900-1,000 units. Blood banks are hoping that the situation will improve as regular blood donation camps resume.