coronavirus pandemic in the Greater Toronto Area for Saturday:Health measures are loosening in several COVID-19 hot spots Saturday as Ontario’s new tiered system takes effect.The colour-coded system — which classifies each public health unit as a red, orange, yellow or green zone based on caseload and transmission levels — came into force at midnight.Only Peel Region, which has seen rising cases in recent weeks, was deemed a red zone, while other hot spots such as York Region and Ottawa were labelled as orange.Toronto, meanwhile, will remain in modified Stage 2 until Nov.