{"url_path":"/weather/alerts/2.49.0.1.840.0.718ca544008130b01f3f851f089230a4a4b2896b.001.1","section_key":"alert","section_title":"Heat Advisory issued July 20 at 1:00PM CDT until July 21 at 8:00PM CDT by NWS Houston/Galveston TX","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-20","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.718ca544008130b01f3f851f089230a4a4b2896b.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Houston/Galveston TX"},"word_count":188,"has_tables":false,"body_markdown":"# Heat Advisory: Heat Advisory issued July 20 at 1:00PM CDT until July 21 at 8:00PM CDT by NWS Houston/Galveston TX\n\n**Severity:** Moderate\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Houston; Trinity; Madison; Walker; San Jacinto; Polk; Burleson; Brazos; Washington; Grimes; Montgomery; Northern Liberty; Colorado; Austin; Waller; Inland Harris; Chambers; Wharton; Fort Bend; Inland Jackson; Inland Matagorda; Inland Brazoria; Inland Galveston; Southern Liberty; Coastal Harris; Coastal Jackson; Coastal Matagorda; Coastal Brazoria; Coastal Galveston; Matagorda Islands; Brazoria Islands; Galveston Island; Bolivar Peninsula\n**Issued by:** NWS Houston/Galveston TX\n**Sent:** 2026-07-20T13:00:00-05:00\n**Effective:** 2026-07-20T13:00:00-05:00\n**Expires:** 2026-07-21T07:00:00-05:00\n\n## Description\n* WHAT...Heat index values up to 108 expected.\n\n* WHERE...Portions of south central and southeast Texas.\n\n* WHEN...From 11 AM to 8 PM CDT Tuesday.\n\n* IMPACTS...Hot temperatures and high humidity will increase the\nrisk for heat-related illnesses to occur, particularly for those\nworking or participating in outdoor activities.\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\nTake extra precautions when outside. Wear lightweight and loose\nfitting clothing. Try to limit strenuous activities to early morning\nor evening. Take action when you see symptoms of heat exhaustion and\nheat stroke."}