More than 40 people have been hospitalised in Las Vegas since Friday, as a heatwave blistered parts of the US.
Las Vegas fire and rescue spokesman Tim Szymanski said: "We will probably start to see a rise in calls Sunday and Monday as the event prolongs.
"People's bodies will be more agitated the longer the event lasts and people may require medical assistance".
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A bronze drum, alongside a plaque for Fusilier Rigby, will be located at Middleton Memorial Gardens.