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Story summary
- A heat dome over the Southern Plains drives a prolonged extreme heat wave across the United States.
- Bob Oravec of the Weather Prediction Center said temperatures will reach or exceed 100 °F regionwide.
- Dallas hit 109 °F Sunday, with forecasts of up to 112 °F Tuesday.
- North-central Texas may see 115 °F, recorded only three times in Wichita Falls since 1923.
- Extreme-heat warnings cover Louisiana, Oklahoma, Arkansas, Texas, New Mexico, southern California and Arizona.
