SQUAM LAKE, N.H. (AP) — A heat wave is moving closer to the breaking point from the Midwest to New England, but there’s no immediate relief in sight for much of the rest of the country. The National Weather Service says the heat and humidity could send heat index readings above 100 degrees in many locations, possibly breaking all-time records. At one campground in New Hampshire, guests were keeping cool using blocks of ice harvested months earlier from a frozen lake. They were packed in sawdust until now, a tradition workers have kept for more than a century. The Weather Service predicts another scorching weekend elsewhere, with triple-digit highs in California and Arizona.