Americans from Texas to Maine sweated out a steamy Saturday as a heat wave canceled events from festivals to horse races and pushed New York City to order power-saving steps to avoid overtaxing the electrical grid. The National Weather Service said "a dangerous heat wave" was expected to break record highs in some places, particularly for nighttime. Daytime temperatures were poised to hit the mid- to upper 90s, with high humidity making it feel considerably hotter. "It's brutal," Jeffrey Glickman said as he paused during a run Saturday morning in Washington. Among the overheated and extreme-weather moments reported by the AP: