PHOENIX (AP) — Extreme heat forced a Phoenix-bound flight to return to Houston.

United Airlines says the hot weather led the plane to return to Texas on Sunday evening and that passengers will be accommodated with an added flight Monday morning.

The National Weather Service says the mercury hit 118 on Sunday, breaking a record of 115 set nearly 50 years ago.

Forecasters expect the same excessively high temperatures Monday in portions of Arizona and southeast California.