Ar gyfer pob digwyddiad sydd wedi’i drefnu yn ystod y cyfnod o wres eithafol, dylai trefnwyr adolygu dulliau cyfathrebu ychwanegol i fynychwyr, gwylwyr a chyfranogwyr - cyn ac yn ystod y digwyddiad - gan gynghori ar ymddygiadau diogel a argymhellir mewn gwres eithafol. Dylent hefyd ystyried yr angen am unrhyw fesurau ychwanegol, mewn perthynas â llwyfannu digwyddiadau a seilwaith, er mwyn lliniaru effeithiau gwaethaf gwres eithafol – er enghraifft darparu cysgod ychwanegol, gorsafoedd dŵr a mesurau eraill. Ar sail ystyriaeth bellach o'r risgiau, dylent asesu a ddylid gohirio'r digwyddiad cyfan neu ran ohono.Sioe Frenhinol Cymru
For all events scheduled during the extreme heat period, organisers should review additional communications out to attendees, spectators and participants - both prior to and during, the event - advising on recommended safe behaviours in extreme heat. They should also consider the need for any additional measures, in relation to event staging and infrastructure, in order to mitigate against the worst effects of extreme heat – for example provision of extra shade, water stations and other measures. Based on further consideration of the risks, they should assess whether all or part of the event should be postponed.Royal Welsh Show