Southeast Asia must brace itself for a punishing spell of climate whiplash, with an expected El Nino threatening drought-like conditions, flash floods, crop losses and haze across the region, experts have warned.The threat is also landing at a fragile moment for emerging economies, analysts add, as geopolitical tensions, higher energy costs and pressure on remittances leave governments and households with less room to absorb climate shocks.Sea surface temperatures in the equatorial Pacific...