In the United States, two Kona-low storms caused record flooding in Hawaii in March 2026, with state officials reported to have put the damage at about $1 billion. In June deadly flash flooding struck Kentucky, and in July the National Weather Service issued Flash Flood Emergencies in Texas. This map gathers, for the last year (October 2025 to October 2026), the days on which the National Weather Service (NWS) issued a Flash Flood Emergency, its highest-level flash flood warning, and floods in NOAA's Storm Events Database with deaths, injuries or estimated property damage of $250,000 or more, grouped into events by state and day. Locations are approximate, based on county names, not the exact flooded site. The NOAA Storm Events data used here cover events through 30 June 2026, so records from July onward are Flash Flood Emergencies only (this limit is described below). These are official records; damage is stated only where the press or authorities confirmed it.
This map lets you follow floods and flash floods by date, place and source.
Each circle marks where a flood or flash flood was confirmed by National Weather Service announcements, NOAA records or the press. Colour shows the type and size shows severity. Select a circle for the date, description and sources. The list is newest first. Locations are approximate, based on county names, not the exact flooded site.
Each record is based on a National Weather Service (NWS) Flash Flood Emergency or a record in NOAA's Storm Events Database. These are official records. Major events are also confirmed by the press, and the sources are listed. Records for which only an official record could be found are marked single-source and carry severity 1. Figures (deaths, damage) are as published, with the date and the source.
Because many warnings are issued each day, the map is filtered by rule, not by count: all Flash Flood Emergencies, and NOAA records only with casualties or damage of $250,000 or more. The details, and the limit that NOAA records are not available after 30 June 2026, are described below. FEMA major disaster declarations do not measure damage, so they appear in the statistics section, not as circles. The map does not address causes or responsibility.
Severity (1 to 3) is a guide set by Map News from published damage. 1: official record only (a Flash Flood Emergency, or minor damage). 2: one or more deaths, estimated property damage of $5 million or more, or a Flash Flood Emergency flagged catastrophic. 3: three or more deaths or estimated property damage of $50 million or more. Severity 2 or 3 is given only when two or more independent sources, for example NOAA/NWS and the press, confirm it. NOAA and NWS documents count as one source. Records the press could not confirm carry severity 1 even when damage is large, and say so.
Filtering rule: All Flash Flood Emergencies issued by the National Weather Service (58 in the last year) are included, with those in the same state on the same day merged into one. From NOAA's Storm Events Database, flood, flash flood, coastal flood and lakeshore flood entries are included only when, in one state on one day, they involve deaths or injuries or estimated property damage of $250,000 or more, merged into one record (entries with less damage are not shown). NOAA data are finalised late and run through 30 June 2026; from July onward only Flash Flood Emergencies are included, without damage records.
The highest level of flash flood warning from the National Weather Service, issued when a catastrophic, life-threatening flood is occurring or imminent. It does not show the actual size of the damage.
No. It is an approximate position from the county name, not the exact flooded site or area.
A record for which only NWS and NOAA records could be found. It carries severity 1 and says so. Records confirmed by the press list those sources.
NOAA's Storm Events Database is finalised late and, when this map was built, ran only through 30 June 2026. From July only NWS Flash Flood Emergencies are listed.
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