A heat dome has moved from Phoenix to Texas, bringing nearly 90 consecutive days of triple-digit high temperatures. The National Weather Service predicts high temperature records will be broken by the weekend. Texas and eastern New Mexico are under major heat alerts due to the rare and prolonged extreme heat with minimal overnight relief.
A heat dome is described as a slow-moving, upper-level high-pressure system with stable air and high temperatures. Meteorologists note that the affected areas are experiencing intense heat with little respite. Record-breaking temperatures are expected in cities like Corpus Christi, San Antonio, and Amarillo.