Rescue teams from the NDRF, Mumbai Fire Brigade, Police, and BMC carried out a massive search operation in Mankhurd on Monday after a three-storey chawl collapsed during heavy rain, trapping several residents under debris. (Pics/Sameer Abedi)

The monsoon has well and truly set in, and our feeds are already overflowing with dreamy reels of the Western Ghats. But rain has a way of changing its nature faster than people expect, experts say. A gentle stream can become a raging river within minutes and rocky paths can turn deadly overnight. Choose your monsoon trek wisely with this handy expert-approved guidebook.