Workers from the Upper Medway Drainage Board have been clearing flooded ditches and culverts as water spills from fields onto roads and into houses.
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The video, obtained by ITV News, shows scores of migrants desperately trying to board lorries in a restricted area within the tunnel.
The grass pollen risk will be very high during warm, sunny weather. Weed pollen will also be airborne
Dry and sunny with long spells of sunshine in the south east and feeling hot