{"url_path":"/weather/alerts/2.49.0.1.840.0.cc67df431d53b2495f92a758146b35e3497878f1.001.1","section_key":"alert","section_title":"Extreme Heat Warning issued July 4 at 5:02PM EDT until July 4 at 9:00PM EDT by NWS Baltimore MD/Washington DC","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-04","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.cc67df431d53b2495f92a758146b35e3497878f1.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Baltimore MD/Washington DC"},"word_count":251,"has_tables":false,"body_markdown":"# Extreme Heat Warning: Extreme Heat Warning issued July 4 at 5:02PM EDT until July 4 at 9:00PM EDT by NWS Baltimore MD/Washington DC\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** District of Columbia; Frederick; Carroll; Northern Baltimore; Cecil; Southern Baltimore; Prince Georges; Anne Arundel; Charles; St. Marys; Calvert; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Southeast Harford; Nelson; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Fairfax; Arlington/Falls Church/Alexandria; Stafford; Spotsylvania; King George; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park\n**Issued by:** NWS Baltimore MD/Washington DC\n**Sent:** 2026-07-04T17:02:00-04:00\n**Effective:** 2026-07-04T17:02:00-04:00\n**Expires:** 2026-07-04T21:00:00-04:00\n\n## Description\n* WHAT...Dangerously hot conditions with heat index values of 110 to\n115.\n\n* WHERE...Portions of DC, central, north central, northeast,\nnorthern, and southern Maryland, and central, northern, and\nnorthwest Virginia.\n\n* WHEN...Until 9 PM EDT this evening.\n\n* IMPACTS...Heat related illnesses increase significantly during\nextreme heat and high humidity events.\n\n* ADDITIONAL DETAILS...Prolonged excessive heat may impact power,\nwater, and transportation systems. Heat index values around 100 to\n105 are possible again Sunday afternoon.\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 and pets in unattended vehicles. Car\ninteriors will reach lethal temperatures in a matter of minutes.\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."}