It's understood 400 pupils had to be led to safety from Catherine Junior School and taken to the nearby infants school at around 2pm.
At its height 46 firefighters were at the scene.
A building inspector from the city council was on the scene to check the safety of the building.
The fire started in the roof.
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His family are extremely worried as they say this is really out of character for Aaron who has never been missing before.
Very mild but often cloudy and damp.
Mostly dry but rather cloudy overnight. Turning windy Monday morning.