According to Truro Weather Map we have no rain of any discernable amounts since the 18th of June, in Penzance we 1.8mm on Saturday Night (30th of June/1st of July).
However on these very hot days it is important that cattle have access to water, unfortunately a cow is herding animal and will choose to drink when others do. Please make sure cows have access to sufficient water a dairy cow under normal heat periods will consume 60-80 litres per day (13- 17 gallons) in this very hot weather it can increase by 25%. If necessary add an extra water trough or top up with a bowser.
If you have pigs outside make sure they have access to a WALLOW, a shallow mud bath regularly filled with water as the mud acts as a sun screen as pigs can get sun burnt.