Sure, here are the major points that would be part of a 2000 word article:

Introduction

Opening with a general introduction about Toronto and its position in relation to sea level, touching on what this means for its citizens and climate. Voicing some interesting facts or recent studies related to Toronto could set the tone for the entire piece.

Geographical Setting of Toronto

Detailed explanation about Toronto's geography and topography. Information about Toronto resting on the slope of the Lake Ontario shore, the major water bodies and landforms within Toronto, and their relative elevation could be shared.

Determining 'Sea Level'

Explaining what 'sea level' means might aid in understanding how we determine the height above it. We can approach it from geographical, geological, and layman perspectives, providing info about how the sea level is usually the zero point from which vertical positions are measured.

Toronto's Height Above Sea Level

According to official data, majority of Toronto sits 76 meters (or 249 feet) above sea level. Giving this value context, you could compare Toronto's elevation with other major cities in the world.

Implications of Toronto's Elevation

Discussing the effects of Toronto's elevation on various aspects - like its climate, weather patterns, risk of floods, and city planning. With Toronto's close proximity to the Great Lakes, it experiences a type of climate known as humid continental climate, which supports its rich and diverse flora and fauna.

Influence on Infrastructure and Urban Planning

A section could be dedicated to how the city's elevation above sea level impacts infrastructure development and urban planning, and how it presents challenges and opportunities in terms of construction, transport, drainage, and green spaces.

Toronto's Rising Sea Levels: A Concern?

Sea level rise due to climate change is a growing concern worldwide. This part would discuss if Toronto is at risk due to rising sea levels, its preparation and resilience against such future changes.

Conclusion

Finally wrapping up by summarizing the main points and indicating the significance of understanding Toronto's position above sea level - to appreciate the city's unique character, climate and challenges. Throughout this extensive piece, you would weave in as much accurate data, compelling visuals, and sources as possible. This will not only make the article informative and reliable but also engaging for those reading.