Some schools in England could remain closed in September if the swine flu pandemic escalates over the summer, the government has admitted.

The Department for Children, Schools and Families (DCSF) said that, while it was expected schools and nurseries would open as usual at the start of the academic year, it could not be "certain what the situation will be" in the autumn.

Decisions on closures would be taken shortly before the start of the autumn term, a message to schools across the country from the department said.The DCSF guidance, issued as many schools broke up for the summer today, said it was monitoring the spread of the H1N1 virus on a day-by-day basis. A message will be sent to schools in the last week of August telling them what to do at the start of term, it added.

The DCSF said: "As the summer term is drawing to an end, it is important to ensure that everyone will be in a position to know what will happen at the start of the autumn term."We expect that schools and early-years and childcare settings will reopen as usual but at this time we cannot be certain what the situation will be then; we will need to monitor developments over the summer, and take decisions based on the best advice available shortly before the start of term."

About 1,000 schools have already recorded cases of swine flu, although most have remained open, according to the DCSF.

Guardian