Some practical advice for keeping kiddies cool in a heatwave. We're British. We don't do this kind of weather.
Kind of obvious but dress them for the weather- in theory babies should have one more layer on than you. But if you would rather strip naked and hide in a cold shower then chances are baby will be happy in just a nappy/nappy and vest.
Create a draft at night- opening windows, opening loft hatches, opening doors, setting up fans etc- you get the idea.
pop a bowl of ice/frozen water bottles in front of a fan to cool down the air a bit more.
DON'T shade your baby in their pram with a piece of material- this is dangerous as the temperature in the pram can raise alarmingly fast as a result.
Obviously you need a hat on them if they are in the sun. try and use a hat that breathes- a thin, straw hat will keep them cooler than a material one.
Remember to keep them hydrated. Not just during the day but at night too. whether this means giving them an extra bottle of milk during the night as a 'dream feed' or just giving them a bit of water.
A bath before bed will cool them off and also relax them before bedtime.
Bear in mind temperature change at night- 7pm will be warmer than 2am so make sure you think ahead for this (e.g. last night Rose slept in her nappy in a very thin tog sleeping bag with a fan on high blowing onto her and another blowing around her room. By 11pm it was ok to lower the fan speeds).
Put a thermometer in their room. Ideally the room should be between 16-20 degrees. This is obviously not going to be the case during a heatwave but it a good way to keep an eye on things.
It is their CORE temperture that you need to keep an eye on. Hands and feet will always be cooler. They should not be sweaty on their head or chest.