The National Weather Service in Quad Cities has issued a

• Flash Flood Warning for…
  Dubuque County in northeastern Iowa…
• Until 900 PM CDT Thursday.
• At 256 PM CDT, Emergency Management reported flash flooding from
  heavy rainfall across the warned area. Between 2 and 3 inches of
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are
  possible in the warned area. Flash flooding is already occurring. HAZARD…Flash flooding caused by thunderstorms. SOURCE…Emergency management reported. IMPACT…Flash flooding of small creeks and streams, urban
  areas, highways, streets and underpasses as well as
  other poor drainage and low-lying areas.
• Some locations that will experience flash flooding include…
  Dubuque, Asbury, Cascade, Epworth, Farley, Peosta, Worthington,
  Rickardsville, Sherrill, Centralia, Sageville, Bernard, Zwingle,
  Bankston, Durango, Graf, Lattnerville, Dubuque County Fairgrounds,
  Camp Little Cloud and Swiss Valley Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don’t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.