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Greetings! I'm VP for Sea Level at nonprofit research group Climate Central. And a scientist.

I'm excited to be participating in my first live tweeting event... almost a twitter newbie. Looking forward to our chat. #HOTM

There are about 100,000 Americans per vertical inch above the high tide line (in the 0 to 10 ft range) #HOTM

Almost half of all Americans living on land below 5 ft are in Florida #HOTM

And more people live on low-lying coastal land (5 ft) in Miami Dade county than in any US state except Fla. #HOTM

There are a ton of highly affected places outside of Fla. too... ask me later in our event, I can share numbers #HOTM

A1: Sea level rise most of all means more flooding. It also pinches beaches and wetlands that help protect from storms #HOTM

A3: (part 1) Sea level rise raises the launch pad for storm surge, so every coastal flood today is already higher & more damaging #HOTM

A3: (part 2) In fact, human-caused sea level rise tipped the balance for 3 of 4 coastal floods in US over the last decade (recent study)

A5: Surprisingly, the places that usually see the mildest flooding, are likely to have the biggest comparative changes #HOTM

A5: 1 ft of sea level rise = a very big deal in places that rarely see more than 1 ft in tides or storms: it doubles the height! #HOTM

While you are thinking of questions, another important development #HOTM

Recent science consensus: about 3 ft, if we keep polluting, 2 if we stop. But new research suggests 6 ft or 2 ft as the choice. #HOTM

these are projected sea levels by end of the century. #HOTM

States with most people at risk from sea level rise (below 5 ft), in order: FL, CA, NY, NJ, MA #HOTM

Thanks so much to WBEZ for hosting #HOTM and @SamEBNHPR for chatting along with me. And thanks for your questions.