Queensland's northeastern tropics has heated up to the mid thirties, the hottest it has been in a year and humidity has made it feel a steamy, high thirties at times. The area from Townsville to Cooktown, including Cairns, reached 36 degrees today. Factoring the humidity it has felt as hot as 39 degrees in Cairns. The high humidity has been left behind by a monsoon which brought hundreds of millimetres of rain during the past week or so. The heat has been drawn from the interior by southwesterly winds which have been blowing around a low pressure system which has moved to the southeast of the state. Tomorrow looks similarly hot and steamy in the northeast tropics and will become as hot and steamy further south as the low continues moving slowly southeast. It should heat up to the mid thirties from the Northern Tropical Coast and Tablelands to the Capricornia and to the low thirties as far south as Brisbane. For the Brisbane area this will be a jump of about nine degrees on today. A side effect of the heat so soon after big rain is an increase in the number of mosquitoes which can spread the risk of disease. From Thursday to the weekend a southeasterly change will run up the east coast, gradually cooling the whole region to near average. Daytime temperatures will return to the high twenties in the south and low thirties in the north.