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making the invisible visible

HighWaterLine is a public performance of drawing a blue chalk line around areas of a city or region indicating it's future flood and storm surge vulnerabilities made more frequent and more dangerous by climate change.


In 2007, artist Eve Mosher conceived of and executed the original HighWaterLine in New York City.  In 2011, she collaborated with Heidi Quante to create HighWaterLine 2.0, which sought to deepen community engagement and ownership of the project in other regions of the world.

After completing HWL Miami and Bristol, Eve & Heidi co-wrote the Guide to Creative Community Engagement to encourage others to take on their own local HighWaterLine or other creative climate project based on the tools they share in the guide.



HighWaterLine uses art and public performance to build community awareness around climate change. This guide provides a roadmap for how to use creativity to spur change.


HighWaterLine was originally created by Eve Mosher in New York City. Through collaboration with Heidi Quante and  partnership with communities around the globe, as well as through community-led initiatives based on the Guide to Creative Communities, HighWaterLine has now occurred in cities around the globe.

New York City


Conceived and enacted by the artist, Eve Mosher, HighWaterLine|NYC brought attention to the future flooding across 75 miles of NYC coastal areas.



In collaboration with Heidi Quante and with co-leads Marta Viciedo and residents of Miami, this project highlighted the future scenarios for the flood prone region.



Eve & Heidi, in collaboration Isobel Tarr and with the support of Invisible Dust, engaged communities across Bristol in action around their current and future flood scenarios.

HWL in partnership

These versions of HighWaterLine were initiated by the communities and Eve & Heidi were brought in as consultants to guide, inform and give feedback to the projects as they unfolded.

Delray Beach


The HighWaterLine Delray Beach project featured the drawing of the blue chalk line and four all day simultaneous art interventions, from 7 AM to 10 PM, located along the chalked lines in each of three historic neighborhoods at significant risk to rising water.



HighWaterLine|Philadelphia, presented by The Chemical Heritage Foundation in conjunction with the World Science Festival linked three geographically disparate locations in the city through the drawing of the chalk line and solutions focused block party.

HWL inspired

After publication of the HighWaterLine Guide to Creative Community Engagement, a number of projects were created and carried out using the guide as a plan. 

Princeton, NJ


Organized by Christina Gerhardt, to walk and chalk New Jersey’s future shoreline as projected by science. This included a series of talks around climate change and the community.

Honolulu, Hawaii


Christina Gerhardt initiated the HighWaterLine iteration in Honolulu and together with Adele Balderston they co-organized three talks and two walks for the Kaka‘ako neighborhood.



Stella d'Ailly created this version of HighWaterLine as part of the Artistic Undressings outdoor art festival and was joined in the walk by artists, neighbours and climate scientists.

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