Families living in Reading in Berkshire, Hampshire and Oxfordshire should find out later whether their children have been given places at their first choice primary schools.
Reading faces a lack of places from 2014 and moves are being made to tackle the lack of places.
While Oxfordshire has 8,000 places and has received fewer than 7,500 applications.
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Drink lots of water, stay out of the sun during the middle of the day, and take particular care of vulnerable people.
Tuesday afternoon's weather for the east of the region