Tropics on the Edge: Uninhabitable Heat and Mega-Floods by 2100

New climate models warn that by 2100 many tropical regions could regularly exceed dangerous heat levels (Heat Index above 103°F, with some places over 124°F) and experience a roughly 41% rise in extreme rainfall, pushing areas like India, Pakistan, Central Africa, and Southeast Asia toward uninhabitable conditions and increasing flood risk in underprepared megacities; another study projects hundreds of millions living in cities above the 29°C mean annual temperature threshold, underscoring stark adaptation gaps and inequality in resilience.