A number of flood warnings and alerts are in place across the region as a result of rising water levels.
It comes after "persistent heavy rain" over the past few days.
Flood warnings are currently in place for Holderness Drain at Wawne Common and Woody Carr and low-lying properties in the Upper Hull catchment.
The warnings say flooding is expected and that "immediate action" is required.
Issuing the warning for Holderness Drain at Wawne Common and Woody Carr, the Environment Agency says: "This warning has been issued as a result of rising river levels on Holderness Drain and Monk Dyke on Burstwick.
"Levels are rising as a result of persistent heavy rain over the last few days. Upstream of Great Culvert Pumping Station levels Holderness Drain is at -0.5m and rising.
"This should ease and pumping will start to help manage the river levels in the area. River levels may remain above normal into the weekend. Areas most at risk are properties at Wawne Common and Woody Carr.
"Our incident response staff are closely monitoring the forecast and river levels. Please avoid using low-lying footpaths near local watercourses and see the GOV.UK website for a five-day flood forecast. This message will be updated in eight hours, or as the situation changes."
The warning for low-lying properties in the Upper Hull catchment says rivers are expected to remain high on Saturday and into Sunday.
"This warning remains in force as a result of rising river levels in the area, particularly on Frodingham Beck at Frodingham Bridge," it says.
"Rivers in this part of the catchment are rising as a result of persistent heavy rain over the last few days. Rivers can be expected to remain high today Saturday December 21 and remain high into Sunday.
"Areas most at risk are low-lying properties in the Upper Hull catchment. Our incident response staff are closely monitoring the forecast and river levels. Please avoid using low-lying footpaths near local watercourses."
Watch: What to do in a flood
The flood alerts issued and currently in place for Hull and East Yorkshire are:
The flood alerts say "flooding is possible" and urge people to "be prepared".
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