The mercury is set to soar this weekend across Perth, with the city possibly seeing its hottest February day in three years on Sunday. A very hot air mass is being directed over the Western Australian capital as a low pressure trough combines with a high pressure ridge which is bringing in hot easterly winds from the interior. Perth is set to reach 37 degrees today, which would make it fourth day out of nine so far this month where it has risen above 35 degrees. However, tomorrow it is going to be even hotter, with it set to soar to an unpleasant 41 degrees. If it gets this hot, this would make it the hottest day the city has seen since December. This would also make it the hottest February day in three years, when it also reached 41 degrees. Temperatures this high can be potentially dangerous, particularly for young children and the elderly. If it is necessary to go outside make sure you drink plenty of water and stay properly hydrated. Into the new week, Monday is also set to reach around 40 degrees, although thunderstorms may bring some much needed relief during the afternoon. Maximums should then remain in the mid 30's until around Thursday, when a cool change drops temperatures back to average.