Heat Advisory: Montague; Cooke; Grayson; Fannin; Lamar; Jack; Wise; Denton; Collin; Hunt; Delta; Hopkins; Parker; Tarrant; Dallas; Rockwall; Kaufman; Van Zandt; Rains; Hood; Somervell; Johnson; Ellis; Henderson; Navarro; Freestone; Anderson; Leon

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Heat Advisory — Montague; Cooke; Grayson; Fannin; Lamar; Jack; Wise; Denton; Collin; Hunt; Delta; Hopkins; Parker; Tarrant; Dallas; Rockwall; Kaufman; Van Zandt; Rains; Hood; Somervell; Johnson; Ellis; Henderson; Navarro; Freestone; Anderson; Leon Severity: Moderate. Certainty: Likely. * WHAT...Heat Index values up to 109 degrees. * WHERE...Portions of north central and northeast Texas. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities.