Mumbai, Nov 9 (PTI) Mumbai has witnessed a surge in fire incidents this Diwali, recording an alarming 137 firecracker-induced blazes on Sunday, in which two firefighters were injured, officials said. Single-day tally exceeds firecracker-related fires recorded during entire Diwali period in each of the previous two. Mumbai records 137 firecracker blazes in 24 hours on Deepavali, prompting urgent safety guidelines from Mumbai Fire Brigade.