Former Egyptian President Hosni Mubarak was flown from prison to hospital, officials said, after judicial authorities ordered his release from prison.
Exclusive footage shown on a private TV station in Egypt showed the military helicopter that lifted him from prison landing and being met by an ambulance.
He is due to be treated in a hospital in the suburb of Maadi, officials told Reuters.
More top news
The country's counter-terrorism forces have regained control of the facility.
The commissioner of the Metropolitan Police has said he cannot promise the public an attack will not take place.
The showers are likely to be particularly heavy across northern parts of the country.