Forecasters say parts of southern England are in for a real downpour from Friday - in fact, they say a month's worth of rain could fall in just a few days.
Severe flood warnings remain in place along the River Thames, and there are fears flooding could spread along the River Severn and the River Wye.
Emergency crews, Environment Agency workers and council staff are having to work around the clock to fight the flood water and give people the support they need.
More than a thousand homes have been evacuated, mainly in the Thames Valley area.
Nel met Olivia and Hannah from Wraysbury in Berkshire who are getting ready for the worst.