The Met Office has issued a weather warning for thunderstorms which are expected to develop over Cambridgeshire today (Thursday).
The forecaster said disruption to power and transport was possible, with driving conditions affected by standing water and spray.
The warning is in place from 1-9pm today, with heavy rain and thunder expected over much of East Anglia.
A spokesman for the Met Office said: "There is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus. Delays to train services are possible.
"Some short term loss of power and other services is likely. Some flooding of a few homes and businesses likely, leading to some damage to buildings or structures."
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