When Saharan dust mixes with rain it creates what is commonly known as blood rain.
Tiny dust particles suspended in the atmosphere are captured by raindrops and deposited onto surfaces, leaving a thin, gritty, reddish-brown residue.
Cars, windows, garden furniture and other outdoor items can become noticeably coated, sometimes requiring a wash to remove the marks.
Parts of England and Wales are expected to experience the most pronounced effects, as dust concentrations are forecast to be highest there due to prevailing winds and the position of high pressure system.
Even areas with lighter dust may notice a faint film on surfaces after rainfall.
Despite its dramatic name and unusual appearance, this type of rain is entirely harmless.
The dust poses no health risk for most people, and any disruption is largely cosmetic.
It is a natural result of Saharan dust being carried long distances by the atmosphere, offering a rare, and sometimes messy, reminder of how far-reaching global weather systems can be.