Flood alerts have been issued for more than 50 miles of Norfolk's coastline.
High tides are expected until 10am today (August 3).
The alerts cover the coast from King's Lynn to Hunstanton, Holme to Wells, Stiffkey to Salthouse and Bacton to Hemsby.
This is due to an unseasonal low-pressure system causing a small tidal surge.
It comes after the area was issued a yellow weather warning from the Met Office for thunderstorms.
People are warned to take care on beaches, coastal roads, quays and footpaths.
There may be some wave overtopping and spray with flood gates closed in Eccles and Sea Palling.
The warning will be updated between 10am and 11pm tomorrow.
The evening tide is not currently forecast to reach flood alert levels.
More information is available on the government's Check For Flooding site.
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