THE TAKEAWAY
- Relentless heat keeps record highs in play in the Southern Plains.
- Dallas could approach a historic heat streak.
- The Texas drought rapidly worsens with little rain ahead.
The relentless heat baking the southern U.S. is shifting its grip, but not letting go, as triple-digit temperatures persist across the Southern Plains and expand into the Southwest.
Triple-digit temperatures will continue through at least Tuesday, with numerous daily records threatened from Texas and Oklahoma to New Mexico and Arizona…