A strong ridge of high pressure will bring an extended heat wave to southwest California with hot and dry conditions through Friday of this week. In addition, very dry conditions and offshore breezes will create elevated to brief critical fire conditions to the area, with potential large smoke plumes and rapid fire spread with any new or existing fire. This is not the time for a long hike or to start outdoor work if you are not prepared for very hot weather. Avoid being outdoors during the hottest part of the day between 10am and 6pm.Drink plenty of water and never leave children or pets in a hot vehicle for any amount of time. In addition, the hot and dry conditions will be very receptive to fire growth that will quickly create strong updrafts and towering smoke plumes. Avoid any fire-related activities during this hot stretch such as campfires, weed abatement, smoking, and fireworks.