As parts of the Midwest continued to experience catastrophic flooding overnight and into Monday, dangerous heat and humidity are expected to set in this week.

Slow-moving storms could bring up to 11 inches of rain, raising the risk of flash floods on Sunday, particularly in Illinois and Indiana, forecasters said.

Most of the country was blanketed by yellow rain and thunderstorm warnings, with the Met Office saying this could bring flash flooding, power cuts and disruption to travel. But the flooding forecast for London and south-east England on Saturday morning did not occur.