International

Cities around the world face more frequent, longer and hotter heat waves as climate change continues to raise average temperatures and amplify extremes. Urban areas are especially vulnerable because the urban heat island effect concentrates heat: paved surfaces, dense buildings and low vegetation can raise local temperatures by 1–7°C relative to nearby rural areas. Preparing for this new normal requires a mix of near-term emergency measures, longer-term planning, infrastructure upgrades, public health interventions and community-focused equity work.The challenge: why intense heat waves are a growing urban riskHeat waves increase risks of heat illness, cardiovascular and respiratory events, and death. Notable…

The move toward low‑carbon electricity depends on grids being able to transfer, regulate, and oversee far greater and more unpredictable energy volumes than they were originally designed to handle, and these systems are repeatedly constrained by technical limits, entrenched practices, regulatory hurdles, and societal pressures. This article describes how that bottleneck functions, highlights real examples that reveal its impact, and presents practical ways to accelerate meaningful progress.How the grid’s physical design collides with clean generationGeography and resource mismatch. Prime wind and solar locations frequently lie far from major load centers. Offshore arrays, distant wind installations, and sun-rich desert zones generate…

A war or political conflict thousands of miles away can raise the price of everyday goods at home through a chain of economic and logistical links. Modern supply chains are tightly interwoven, and essential inputs such as energy, metals, food, and shipping capacity are concentrated in a relatively small number of producing regions. When conflict disrupts production, trade flows, insurance, or finance in those regions, the cost of inputs rises and producers pass those costs on to consumers.Key transmission channelsCommodity supply shocks — Conflicts that disrupt the export flow of oil, gas, wheat, fertilizers, or metals cut global availability and…

Freshwater is essential for life, food production, energy generation, industry, and ecosystem services. Yet the global distribution of accessible freshwater is limited and uneven. Only about 2.5% of the planet’s water is freshwater, and a very small fraction of that—roughly 0.3% of total global water—is readily accessible on the surface for human use. At the same time, population growth, urbanization, changing diets, and economic development are driving rising demand. Climate change, shrinking glaciers, groundwater depletion, pollution, and deteriorating infrastructure are reducing supply reliability. These forces combine to elevate water from a local resource management issue to a source of transboundary…