This is the moment a tower block 'disappeared' into the distance as a sea fret rolled in from the North East coast.

Despite the ongoing heatwave, people in Sunderland were plunged into cooler temperatures at around 1pm on Friday.

That is because a fog rolled in from the North Sea, bringing with it a moment of relief amid temperatures in the city of 26c plus.

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Residents in the area described it being "freezing" in comparison to the extreme temperatures we have felt in recent days.

The Northern Echo: Picture: NORTHERN ECHOPicture: NORTHERN ECHO

The Northern Echo: Picture: NORTHERN ECHOPicture: NORTHERN ECHO

The Northern Echo: Picture: NORTHERN ECHOPicture: NORTHERN ECHO

It comes as a number of areas across England, but not the North East, have been placed in an official drought amid soaring heat.

Meanwhile, Yorkshire Water is set to introduce a hosepipe ban to help preserve supplies for millions of homes.

What is fog?

According to the Met Office, also known as sea 'fret,' Coastal fog happens when warm air moves over the cool surface of the North Sea towards the east coast of the UK.

When it happens, the cold air just above the sea's surface cools the warm air above it until it can no longer hold its moisture.

This then forces the warm air to condense, forming tiny particles of water which forms the fog that you can see.

Coastal fog usually occurs in the spring and summer months when conditions begin to warm up but the sea (which warms more slowly) stays relatively cold.

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