Cafodd Dawns Glaw ei sefydlu yn 2015, ac mae'n cynnwys cynrychiolwyr o Lywodraeth Cymru, yr Awdurdodau Tân ac Achub, Gwasanaethau'r Heddlu, yr Awdurdodau Lleol, y Swyddfa Dywydd, Cyfoeth Naturiol Cymru, Clybiau Ffermwyr Ifanc, Crimestoppers ac eraill. Bu gostyngiad o 50% yn nifer y tanau glaswellt yng Nghymru yn ystod y ddwy flynedd diwethaf a gostyngiad o dros 1000 o’r nifer o ddigwyddiadau a fynychwyd gan Wasanaethau Tan ac Achub o ganlyniad i weithio mewn modd amlasiantaethol fel hyn. Mae gwaith yr asiantaethau gyda phobl ifanc sydd mewn perygl o droseddu wedi llwyddo i sicrhau newidiadau mawr mewn ymddygiad, ac nid oes ond nifer bach o achosion o aildroseddu - enghraifft gadarnhaol o effaith hirdymor gwaith ataliol o’r fath.
Dawns Glaw was established in 2015 and includes representatives of Welsh Government, FRAs, Police Services, Local Authorities, Met Office, Natural Resources Wales, Young Farmers Clubs, Crimestoppers and others. Multi-agency work like this has led to a reduction of 50% in grass fires in Wales over the past two years and a reduction of over 1,000 in the number of attendances made by the Fire & Rescue Services. Their interventions with young people at risk of offending has showed to consistently achieve exceptional levels of behaviour change and minimal reoffending rates, a positive example of how engagement through prevention has a long lasting effect.