Level 4 flood emergency across the Gulf Coast; Louisiana declares statewide emergency; Mississippi dam scare and Texas heat compound the threat.

Today’s brief leads with the remnants of Tropical Storm Arthur, which have stalled over the Deep South and triggered a rare Level 4 High Risk for excessive rainfall from Louisiana to the Florida Panhandle. Louisiana has declared a statewide emergency with flood rescues underway in Avoyelles Parish, Mississippi faced a dam scare near Carriere that emergency officials later resolved, and dangerous heat grips south-central Texas. We also cover the latest NIFC wildfire situation report and a new FEMA major disaster declaration for Delaware. EM Morning Brief is your concise daily update on national and state-by-state emergency management news. Produced by Sitch Radio, an EOC Voices podcast.Key Takeaways• Tropical Storm Arthur remnants: A rare Level 4 of 4 High Risk for excessive rainfall covers Louisiana to the Florida Panhandle, with five flash flood emergencies declared across southern Louisiana and Mississippi and at least three storm-related deaths.• Louisiana state of emergency: Governor Landry declared a statewide emergency; flood rescues are underway in Avoyelles Parish, where parts recorded 12 to 26 inches of rain and at least 200 homes flooded, with a Red Cross shelter open in Mansura.• Mississippi dam scare: Early reports of an Anchor Lake Dam failure near Carriere prompted a precautionary evacuation; the Mississippi Emergency Management Agency later confirmed the dam was not breached and lifted the order. A clean-up worker was killed.• Texas heat and flooding: Arthur made landfall June 17, two people died in central Texas flash flooding, and Extreme Heat Warnings along and east of I-35 pushed temperatures to 105 to 115 degrees.• Wildfire posture: NIFC holds the National Preparedness Level at 2, with 27 large fires being suppressed and about 4,988 personnel assigned nationally.• FEMA Delaware declaration: A Presidential major disaster declaration (FEMA-4916-DR) for a February severe winter storm, Public Assistance only, was published in the Federal Register on June 18.SponsorsThe NIMS Store - https://thenimsstore.comSourcesNWS / Weather Prediction Center• Fox Weather: Life-threatening flash flood emergencies as Arthur’s remnants slam the South• Washington Post: Where risk remains as Arthur’s remnants sweep through the South• Weather.com: Flash flood emergency issued due to compromised dam in South MississippiNational Hurricane Center• NHC: 2026 Atlantic Hurricane Season• AccuWeather: Tropical Storm Arthur makes landfall in Texas, raises flood risk across southern USNIFC (Wildfire)• NIFC: Incident Management Situation Report, June 18, 2026• NIFC: National Interagency Coordination CenterFEMA• SBA / Federal Register: Presidential major disaster declaration for Delaware, Public Assistance only (June 18, 2026)• FEMA: Disasters and Other DeclarationsAlabama• Alabama Public Radio: Alabama and the South get a drenching, and worse, from what’s left of Arthur• Fox Weather: Life-threatening flash flooding slams multiple states as Arthur sweeps the SouthFlorida• MyPanhandle: Local impacts moving in from remnants of Arthur• Pinellas County: Precautionary boil water notice for Pinellas Park residentsGeorgia• Fox Weather: Days of rain, potentially life-threatening flash flooding plague the South amid post-tropical ArthurLouisiana• WAFB: Large-scale flood rescue effort launched in Avoyelles Parish• Louisiana Illuminator: Flooding, tornadoes pound SE Louisiana from fizzled Tropical Storm Arthur• CBS News: State of emergency declared in Louisiana over deadly floodingMississippi• WWL: Residents urged to evacuate amid risk of Anchor Lake Dam break• WLOX: Anchor Lake Dam in Carriere at risk of failure• KTBS: Tropical Storm Arthur remnants cause Mississippi dam scare and widespread flash floodingTexas• CBS Austin: Tropical Storm Arthur triggers severe flood warnings across 6 states• Click2Houston: Houston transitions to a scorching forecast in the wake of Tropical Storm Arthur