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City of St. Louis Emergency Management
Monday May 18th, 2026 :: 05:30 p.m. CDT

Advisory

Flash Flood Warning - UPDATE

UPDATE: The National Weather Service in St Louis has issued a Flash Flood Warning for the City of St. Louis until 8:15 PM CDT. 

* At 512 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 0.5 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

This includes the following highways... Interstate 70 in Missouri between exits 203 and 231. Interstate 44 in Missouri between exits 261 and 277.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles.

Address/Location
City of St. Louis Emergency Management
1915 Olive St
St. Louis, MO 63103

Contact
Emergency: 9-1-1

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