A sweltering heat wave that hammered the eastern United States this week is finally easing, officials said Tuesday. Temperatures that topped 100°F from Maine down to the Carolinas strained electricity providers, forced curtailments of outdoor festivities and prompted emergency alerts. As cooler air moves in, utility operators are beginning to restore capacity that had been throttled to prevent outages and coordinate with state emergency managers.

Energy traders saw volatility spike as demand surged, pushing spot power prices in New England by double digits. Regional transmission organizations reported near‑capacity flows on key corridors, raising concerns among investors about infrastructure resilience. Companies that own grid assets, such as National Grid, faced heightened scrutiny, while insurers reassessed exposure to heat‑related claims. The surge also tightened margins for gas‑fired generators during peak hours.

Meteorologists warn that the lingering heat will fuel atmospheric instability, increasing the probability of severe thunderstorms and possible tornadoes later this week. Businesses in the hospitality and outdoor event sectors must prepare for sudden cancellations, while construction firms may confront work stoppages. Retail outlets reporting higher sales of cooling equipment. Storm risk now adds a second layer of operational pressure for companies across the region.