Can you refuse to work or send your kids to school during a heatwave?

Wire excerpt

Can you refuse to work or send your kids to school during a heatwave? BBC Storms hit West Country as schools close early amid rare Met Office red weather warnings BBC Schools shut as heatwave sends UK into meltdown The Telegraph How hot is too hot to learn? Tes Will schools close as temperatures hit 38C in the June heatwave? The Independent