The tsunami warnings that followed the powerful earthquake off Russia’s Kamchatka peninsula on Wednesday were another jarring reminder of Asia’s vulnerability to natural disasters and a wake-up call for the region to strengthen its defences before the next crisis hits.Extreme weather has once again been testing the region’s resilience in recent weeks. Earlier this month, Typhoon Wipha lashed parts of Southeast Asia, unleashing floods, disrupting flights and damaging infrastructure. Hong Kong...