The engine oil warning light as seen in the image is displayed on the dashboard. The light has recently come on and doesn't go off after starting the car up.
The engine temperature reading on the dashboard gauge is noticeably higher than usual. It doesn't seem to be caused by sitting in traffic on a hot day, it is generally just higher all the time.
There appears to be a puddle of oil underneath the car, the oil looks fresh and seems to be dripping from parts of the engine.
When the engine is running there is a smell of burning oil coming from the engine area.