This isn't an ordinary heat wave. Many locations could set new all-time March, even April, record highs from the West Coast into the Plains. And this will have one other impact that could linger into ...

Temperatures 30 degrees above normal are expected in parts of California as a startling weather event unfolds over the next 10 days.

California tied the highest winter temperature ever measured in the U.S. on Wednesday, as a heat wave intensified and shattered March heat records across the state.