The meteorological centre on Tuesday cautioned of moderate flash flood risk in isolated parts of seven out of 12 districts -- Kangra, Sirmaur, Chamba, Shimla, Kullu, Kinnaur and Mandi -- in Himachal Pradesh in the next 24 hours.

The weather office also issued an `orange` alert of heavy to very heavy rain, thunderstorm and lightning at isolated places in the state on August 7 and 10 and `yellow` warning of heavy rain on the remaining days till August 12.