{"url_path":"/weather/alerts/2.49.0.1.840.0.3be2f995bf53ed6b0ee8faad758375e57641a991.001.1","section_key":"alert","section_title":"Heat Advisory issued July 21 at 11:46AM CDT until July 22 at 8:00PM CDT by NWS Austin/San Antonio TX","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-21","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3be2f995bf53ed6b0ee8faad758375e57641a991.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Austin/San Antonio TX"},"word_count":144,"has_tables":false,"body_markdown":"# Heat Advisory: Heat Advisory issued July 21 at 11:46AM CDT until July 22 at 8:00PM CDT by NWS Austin/San Antonio TX\n\n**Severity:** Moderate\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Llano; Burnet; Williamson; Hays; Travis; Bastrop; Lee; Medina; Bexar; Comal; Guadalupe; Caldwell; Fayette; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca\n**Issued by:** NWS Austin/San Antonio TX\n**Sent:** 2026-07-21T11:46:00-05:00\n**Effective:** 2026-07-21T11:46:00-05:00\n**Expires:** 2026-07-22T01:15:00-05:00\n\n## Description\n* WHAT...High temperatures of 100 to 104 degrees and heat index\nvalues up to 112 degrees expected.\n\n* WHERE...Areas generally along and east of the Interstate 35\ncorridor.\n\n* WHEN...From Noon to 8 PM CDT Wednesday.\n\n* IMPACTS...Hot temperatures and high humidity may cause heat\nillnesses.\n\n## Instructions\nDrink plenty of fluids, stay in an air-conditioned room, stay out of\nthe sun, and check up on relatives and neighbors.\n\nDo not leave young children or pets in unattended vehicles. Car\ninteriors will reach lethal temperatures in a matter of minutes."}