The Met Office has issued a yellow weather warning for the risk of torrential downpours and thunderstorms in the Anglia region overnight Sunday into Bank Holiday Monday.
Although many areas will miss the heaviest rain, the Met Office says where the downpours occur there could be some disruption, with sudden flooding of roads, transport routes, homes and businesses possible locally.
The forecaster is also warning that frequent lightning in association with the heaviest rain may also temporarily disrupt power supplies.
The humid conditions are set to continue for a little while yet.
Warm, humid and dry for Saturday - despite overcast spells
A chilly start with some sunshine. Turning warmer allowing the cloud to build.