US Heat Wave Affects Tens of Millions

Tens of millions of Americans faced extreme heat on Tuesday as a prolonged heat wave gripped central and eastern regions, with temperatures soaring into the triple digits and threatening to persist through the July 4 holiday weekend. The National Weather Service issued heat advisories for parts of Illinois, Indiana, Ohio, and the Mid-Atlantic, warning of potentially dangerous conditions that could exacerbate health risks, particularly for vulnerable populations. Cities such as Chicago, Indianapolis, and Washington, D.C. reported temperatures exceeding 100°F, with humid conditions amplifying the perceived heat to near 110°F in some areas.

Authorities urged residents to limit outdoor exposure, stay hydrated, and seek air-conditioned spaces, as prolonged heat exposure can lead to heat exhaustion, dehydration, and heatstroke. Public cooling centers were activated in several urban areas, and transit systems extended operating hours to accommodate those without access to cooling. Meteorologists attributed the heat wave to a persistent high-pressure system, which is expected to maintain above-average temperatures through at least Sunday. While some relief may come later in the week with isolated thunderstorms, the National Weather Service warned that the heat could set or tie record highs in multiple locations, underscoring the intensity of the ongoing event.