Well I didn't expect this thread to have quite such a massive response.
To answer just a few questions.
Yes I'm aware it would cause childcare issues and I'm not saying it's an ideal answer, we need to look into other ways to make life bearable in schools if this is set to be a trend for the future some ideas would include installing decent aircon in schools, changing the uniform, changing the curriculum demands, possibly changing the term dates, and all the other sensible suggestions this thread has thrown up.
No I don't want to be paid if the school closes, I would happily forfeit a few days pay to make life more bearable for the children. I would like to point out that TAs are not in it for the money, we're on around £10 an hour and we do it because funnily enough we care about children and want to help improve their lives through education. This is not about me wanting to skive, I go above and beyond in my job.
Those of you saying that it's no different at home than at school, I can only presume you have no experience of working in a school. 30+ hot bodies trying to work and play together in extreme heat is very very different to a family at home. At home you can reduce activity levels, have a cold shower or bath, have an ice pop, sit in your pants, flop about and do very little. You don't need a garden to do those things. It's the relentless nature of school life that makes it so very difficult. Children are fractious and grumpy when they are hot. Come and volunteer in a school on a hot day and you'll soon see how difficult it is.
I do think this issue needs to be addressed asap so that we can all carry on sending our children to school in a safe environment where they can continue to grow and learn without feeling ill.