NBC News' Ayman Moyheldin reports that the situation is unlikely to calm down in Egypt, describing the "sense of chaos" that has gripped the country.
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Temperatures will feel a little milder compared to of late with highs reaching 14C (57F).
Dozens of common treatments to help with a range of ailments are apparently of little or no use.
The prime minister has offered Scotland, Wales and Northern Ireland a "direct line" to Brexit Secretary David Davis.