The Met Office has issued a 12-hour warning for thunderstorms in areas of Powys from this evening.
The yellow warning for thunderstorms begins at 8pm this evening (Wednesday) and runs until 8am tomorrrow morning (Thursday).
Brecon, Talgarth, Hay-on-Wye, Crickhowell, Ystradgynlais and Llandovery are all included within the warning area.
Heavy rain is expected, with a chance of thunderstorms, leading to travel disruption and some flooding.