Thunderstorm warning for Calderdale as Met Office issues weather warning

A yellow weather warning is now in place until 9pm with predicted heavy storms.

A spokesperson for the Met Office said: "Heavy showers and thunderstorms will break out this afternoon before slowly fading this evening.

"Whilst not all places will be affected by these shower and thunderstorms, where they do occur torrential downpours are possible. 15 to 25 mm rain may fall in an hour in some places whilst a few spots could see 30 to 40 mm rain in two or three hours.

"Frequent lightning is possible and a few places may see some hail.

What to expect according to the Met Office

Some flooding of a few homes and businesses likely, leading to some damage to buildings or structures

Probably some damage to a few buildings and structures from lightning strikes

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

What can happen before the thunderstorm

Lightning can cause power surges, unplug any non-essential appliances if not already using a surge protector.

Seek shelter if possible. When you hear thunder you are already within range of where the next ground flash may occur, lightning can strike as far as 10 miles away from the centre of a storm.

What to do during the thunderstorm

Telephone lines can conduct electricity so try to avoid using the landline, unless in an emergency

If outside avoid water and find a low-lying open place that is a safe distance from trees, poles or metal objects

Avoid activities such as golf, rod fishing or boating on a lake

Be aware of metal objects that can conduct or attract lightning, including golf clubs, golf buggies, fishing rods, umbrellas, motorbikes, bicycles, wheelchairs, mobility scooters, pushchairs, wire fencing and rails. If you are in a tent, try to stay away from the metal poles

If you find yourself in an exposed location it may be advisable to squat close to the ground, with hands on knees and with head tucked between them. Try to touch as little of the ground with your body as possible, do not lie down on the ground

If you feel your hair stand on end, drop to the above position immediately