NORTH Yorkshire County Council and the Environment Agency are urging people to be aware of the dangers of flash flooding after the Met Office issued an early warning that "isolated heavy, and possibly severe", thunderstorms are expected to develop this evening across parts of England, which are likely to become more frequent later.

It says some torrential downpours are possible, leading to localised surface water flooding, with large hail and frequent lightning also possible hazards and the public should be aware there is a chance of some very localised significant disruption.

Last August, intense storms caused flash flooding in a number of communities across Yorkshire.

Kim Tan, flood resilience advisor for the Environment Agency, said: “With summer thunderstorms it can be hard to accurately predict where exactly they will develop and how intense the rain will be. As a result, it can be very difficult to issue a timely flood warnings – so it’s essential householders and communities develop flood action plans in advance.”

Steps you can take to prepare for flash flooding include:

• Move important items upstairs/above ground level now as a precaution, as there will be little time to do such things during a flash flood

• Look out for forecasts of thunderstorms or heavy rain, and be alert to fast rising water levels with churning, dark water or a build up of debris in rivers and streams;

• If flash flooding occurs, above all stay safe - never walk or drive through floodwater as it only takes 15cms of fast-flowing water to knock an adult over and 60cms to sweep away a 4x4 car or small lorry.

• If you can’t get away in time, then move to higher ground or move upstairs if you are in a building with two or more storeys;

• Always co-operate with the emergency services and follow their advice once they arrive.

Robin Derry, senior emergency planning officer for North Yorkshire County Council, said: “While we cannot prevent the rain or prevent flooding entirely, we can help communities become more resilient. “Knowing your flood risk is the first step to protecting your family and property. Once you know the risks, you can put measures in place to stay safe.’ Both the Environment Agency and the county council are currently working in communities across North Yorkshire to raise both awareness and resilience.

With their support, Hawnby, Rievaulx Abbey and South Milford Parish Councils have developed Community Emergency Plans which detail how local communities will respond to emergencies including flooding.

If you would like to become actively involved to get your community prepared first speak to your parish/town council to check work is not already underway. Otherwise phone the Environment Agency on 03708 506506 for advice, or see emergencynorthyorks.gov.uk