Here are some useful links which you may find helpful during tis speak of unusually hot weather. 

 

https://www.sja.org.uk/get-advice/first-aid-advice/effects-of-heat-and-cold/heatstroke/

 

https://www.sja.org.uk/get-advice/first-aid-advice/effects-of-heat-and-cold/heat-exhaustion/?gclid=EAIaIQobChMI3K_1ucyA-QIVA-rtCh1iLgH8EAAYASAAEgIFSvD_BwE&gclsrc=aw.ds