The Grid Is Being Watched. The Ceasefire Is Being Tested. And Half the Country Is on Weather Alert.

Today’s EM Morning Brief leads with a joint advisory from CISA, the FBI, NSA, EPA, DOE, and U.S. Cyber Command warning that Iranian-affiliated cyber actors are actively exploiting programmable logic controllers across U.S. water, energy, and government systems. Advisory AA26-097A documents confirmed operational disruptions and financial losses. NERC is actively monitoring the electric grid in response. A fragile two-week ceasefire between the United States and Iran — brokered by Pakistan on April 7–8 — remains under pressure as President Trump keeps military assets in position and a dispute over Lebanon’s inclusion threatens the agreement’s scope.On the weather front, Hawaii is experiencing its third consecutive major flooding event in three weeks, with a statewide Flood Watch in effect through Friday. Florida’s East Coast is under a Flash Flood Watch and Wind Advisory with dangerous surf conditions. Active fire weather is affecting South Carolina and Georgia. In Colorado, two wildfires near Boulder and Berthoud were both contained April 8 with no structures lost. FEMA officially designated 15 Tennessee counties as disaster areas following Winter Storm Fern. A boil water notice is active in Petal, Mississippi.All 50 states and U.S. territories are covered.Takeaways:Operators of Rockwell Automation/Allen-Bradley CompactLogix and Micro850 PLCs should restrict internet-facing access, apply available patches, and report suspicious activity to CISA or the FBI without delay.The domestic cyber threat posture remains elevated. The U.S.-Iran ceasefire is active but unsettled — monitor developments and lower thresholds for reporting suspicious cyber and physical security activity.Hawaii emergency managers should anticipate continued flooding, road closures, and potential landslides through Friday as a third consecutive storm stresses response resources statewide.Fire weather conditions in South Carolina and Georgia remain dangerous. Confirm current red flag and burn restriction status with state forestry commissions before authorizing any outdoor burning.Tennessee jurisdictions in the 15 designated counties should begin documenting eligible costs for FEMA Public Assistance. Individual Assistance determination is still pending federal review.SourcesCISA• CISA Advisory AA26-097A — Iranian-Affiliated Cyber Actors Exploit PLCs Across US Critical Infrastructure (April 7, 2026)• CISA / Federal Agencies Issue Advisory on Iran-Related Cyberattacks — ABA Banking Journal• Iran-Linked Hackers Target Water, Energy in US — Cybersecurity Dive• Iranian Hackers Targeting American Critical Infrastructure — TechCrunchDHS / NTAS• DHS National Terrorism Advisory System — Official NTAS Page (note: site not updated since February 17, 2026 due to federal funding lapse)NERC / Energy Grid• NERC Is Actively Monitoring the Grid Following Iran-Linked Cyber Threat — Utility Dive (April 8, 2026)US-Iran Conflict• Iran War Live Blog, April 9, 2026 — Al Jazeera• US-Iran Ceasefire Deal: What Are the Terms, and What’s Next? — Al Jazeera (April 8, 2026)NIFC / Wildfire (National)• NIFC National Fire News — National Interagency Fire Center• Unprecedented Snow Drought Sets Up Extreme Wildfires for Western US in 2026 — Wildfire TodayNOAA / NWS• NWS Active Alerts• NWS Weather Prediction Center• NWS Storm Prediction Center — Day 1 Convective OutlookState Department / Travel Advisories• Sao Tome and Principe — Level 3 Travel Advisory (April 8, 2026) — US Embassy Angola and Sao Tome• US State Department Travel Advisories — travel.state.govAlaska• Above-Average Spring Breakup Flooding Expected in Interior Alaska — Fairbanks News MinerArkansas / Oklahoma• Severe Thunderstorms Moving Through Northeast Oklahoma — NewsOn6• SPC Day 1 Convective Outlook — Storm Prediction CenterColorado• Goat Trail Fire 100% Contained — 9NEWS• Cougar Run Fire Contained at 3.5 Acres — Larimer County• Evacuation Orders Lifted for Boulder and Larimer County Fires — Denver GazetteFlorida• NWS Melbourne — Flash Flood Threat• NWS South Florida Hazardous Weather OutlookGeorgia• Fire Danger Elevated Across North and Central Georgia April 8 — Cobb Courier• Red Flag Warning Issued in Georgia as Dry, Windy Conditions Raise Fire Risk — CBS Atlanta• Campfire Ban Issued for Chattahoochee-Oconee National Forest — AccessWDUNHawaii• Hawaii Under Statewide Flood Watch — Honolulu Star-Advertiser (April 8, 2026)• Third Storm in Three Weeks to Unleash More Rain, Flooding in Hawaii — AccuWeather• Hawaii Statewide Flood Watch April 2026: Visitor Travel Alert — Hawaii GuideMississippi• Petal Residents Under Boil Water Notice Following Outage — WDAM (April 9, 2026)Montana• Holmes Fire West of Montana City Controlled, Evacuation Notice Cleared — Montana Right NowSouth Carolina• SC Forestry Commission Lifts Red Flag Fire Alert for 25 Counties — Live 5 News (April 8, 2026)• <a...