{"url_path":"/weather/alerts/2.49.0.1.840.0.53d59ae531231890cdf91834eb7d210cd3a958d7.001.1","section_key":"alert","section_title":"Dense Smoke Advisory issued July 20 at 5:32PM EDT until July 21 at 10:00AM EDT by NWS Charleston SC","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-20","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.53d59ae531231890cdf91834eb7d210cd3a958d7.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Charleston SC"},"word_count":142,"has_tables":false,"body_markdown":"# Dense Smoke Advisory: Dense Smoke Advisory issued July 20 at 5:32PM EDT until July 21 at 10:00AM EDT by NWS Charleston SC\n\n**Severity:** Moderate\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Inland Berkeley\n**Issued by:** NWS Charleston SC\n**Sent:** 2026-07-20T17:32:00-04:00\n**Effective:** 2026-07-20T17:32:00-04:00\n**Expires:** 2026-07-21T04:00:00-04:00\n\n## Description\n* WHAT...Visibility 1 mile or less in dense smoke.\n\n* WHERE...Inland Berkeley County.\n\n* WHEN...Until 10 AM EDT Tuesday.\n\n* IMPACTS...Thick smoke will make travel difficult and could cause\nrespiratory difficulty.\n\n* ADDITIONAL DETAILS...The Horse Island Wildfire burning in the\nFrancis Marion National Forest near Shulerville is producing\nwidespread dense smoke with visibility 1 mile or less across\nportions of northeast Berkeley County. Visibilities may lower to\n1/4 mile or less overnight as winds diminish and the smoke lowers\ncloser to the ground. Heed any evacuation orders from local, state\nor federal officials.\n\n## Instructions\nPersons with respiratory illnesses should remain indoors to avoid\ninhaling smoke."}