Colin Raymond
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I am an Assistant Research Scientist at the University of California, Los Angeles. My research centers on understanding how weather systems interact with geographical features and human decision-making to produce heat extremes and compound disasters. In this, I draw from observation-based products, physical and machine-learning models, and interdisciplinary knowledge exchange. Designing and communicating climate science in ways that facilitate its serving the collective good also strongly motivates my work.
CV: Sep 19, 2026 version Bluesky: @regclimo LinkedIn: profile page Github: cr2630git Podcast: "Climate Quandaries" Recent interviews & media coverage: Financial Times, Eos, Urgent Futures, SciDev.net, ABC News Australia, Washington Post (x2), The Guardian, AFP, E&E News |
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Peer-Reviewed Publications [as Lead Author]
Raymond, C.*, Willett, K.*, Horton, R., Lo, Y., and Rogers, C. (2026). Humid-heat extremes over land. In "State of the Climate in 2025" (Blunden, J., and J. Reagan, Eds.). Bulletin of the American Meteorological Society. doi:10.1175/2026bamsstateoftheclimate.1.
Raymond, C., García-Martínez, I., Rogers, C., Chen, Y., Han, W., Libonati, R., Simpson, N., White, C., and Zscheischler, J. (2026). Compound weather and climate events in 2025. Nature Reviews Earth and Environment. doi:10.1038/s43017-026-00797-9.
Raymond, C., Suarez-Gutierrez, L., Thompson, V., and van der Wiel, K. (2025). Distinct favored regions for historical record-setting and future record-breaking humid heat. AGU Advances. doi:10.1029/2025av001963.
-News coverage from Eos
Raymond, C., Matthews, T., and Tuholske, C. (2024). Evening humid-heat maxima near the southern Persian/Arabian Gulf. Communications Earth and Environment. doi:10.1038/s43247-024-01763-3.
Raymond, C., Shreevastava, A., Slinskey, E., and Waliser, D. (2024). Linkages between atmospheric rivers and humid heat across the United States. Natural Hazards and Earth System Sciences. doi:10.5194/nhess-24-791-2024. [Twitter thread]
Raymond, C., Waliser, D., Guan, B., Lee, H., Loikith, P., Massoud, E., Sengupta, A., Singh, D., and Wootten, A. (2022). Regional and elevational patterns of extreme heat stress change in the US. Environmental Research Letters. doi:10.1088/1748-9326/ac7343.
-News coverage from JPL
Raymond, C., Suarez-Gutierrez, L., Kornhuber, K., Pascolini-Campbell, M., Sillmann, J., and Waliser, D. E. (2022). Increasing spatiotemporal proximity of heat and precipitation extremes in a warming world quantified by a large model ensemble. Environmental Research Letters. doi:10.1088/1748-9326/ac5712. [Twitter thread]
Raymond, C., Matthews, T., Horton, R., Fischer, E., Fueglistaler, S., Ivanovich, C., Suarez-Gutierrez, L., and Zhang, Y. (2021). On the controlling factors for globally extreme humid heat. Geophysical Research Letters. doi:10.1029/2021gl096082. [Twitter thread]
Raymond, C., Horton, R., Zscheischler, J., Martius, O., AghaKouchak, A., Balch, J., Bowen, S., Camargo, S., Hess, J., Kornhuber, K., Oppenheimer, M., Ruane, A., Wahl, T., and White, K. (2020). Understanding and managing connected extreme events. Nature Climate Change. doi:10.1038/s41558-020-0790-4.
-News coverage from Columbia University, CBS News
Raymond, C., Matthews, T., and Horton, R. (2020). The emergence of heat and humidity too severe for human tolerance. Science Advances. doi:10.1126/sciadv.aaw1838.
-News coverage from Science, Scientific American, AAAS, Bloomberg, Climate Central, CNN, Columbia Magazine, Columbia University, NBC News, New Scientist, Newsweek, NOAA, Quartz, The Economist, The Guardian, The National (UAE), Washington Post, Weather.com, Wunderground
-Also see our article in The Conversation
Raymond, C., and Mankin, J. (2019). Assessing present and future coastal moderation of extreme heat in the Eastern United States. Environmental Research Letters. doi:10.1088/1748-9326/ab495d.
Raymond, C., Singh, D., and Horton, R. (2017). Spatiotemporal patterns and synoptics of extreme wet-bulb temperature in the contiguous United States. Journal of Geophysical Research: Atmospheres. doi:10.1002/2017jd027140.
Raymond, C., García-Martínez, I., Rogers, C., Chen, Y., Han, W., Libonati, R., Simpson, N., White, C., and Zscheischler, J. (2026). Compound weather and climate events in 2025. Nature Reviews Earth and Environment. doi:10.1038/s43017-026-00797-9.
Raymond, C., Suarez-Gutierrez, L., Thompson, V., and van der Wiel, K. (2025). Distinct favored regions for historical record-setting and future record-breaking humid heat. AGU Advances. doi:10.1029/2025av001963.
-News coverage from Eos
Raymond, C., Matthews, T., and Tuholske, C. (2024). Evening humid-heat maxima near the southern Persian/Arabian Gulf. Communications Earth and Environment. doi:10.1038/s43247-024-01763-3.
Raymond, C., Shreevastava, A., Slinskey, E., and Waliser, D. (2024). Linkages between atmospheric rivers and humid heat across the United States. Natural Hazards and Earth System Sciences. doi:10.5194/nhess-24-791-2024. [Twitter thread]
Raymond, C., Waliser, D., Guan, B., Lee, H., Loikith, P., Massoud, E., Sengupta, A., Singh, D., and Wootten, A. (2022). Regional and elevational patterns of extreme heat stress change in the US. Environmental Research Letters. doi:10.1088/1748-9326/ac7343.
-News coverage from JPL
Raymond, C., Suarez-Gutierrez, L., Kornhuber, K., Pascolini-Campbell, M., Sillmann, J., and Waliser, D. E. (2022). Increasing spatiotemporal proximity of heat and precipitation extremes in a warming world quantified by a large model ensemble. Environmental Research Letters. doi:10.1088/1748-9326/ac5712. [Twitter thread]
Raymond, C., Matthews, T., Horton, R., Fischer, E., Fueglistaler, S., Ivanovich, C., Suarez-Gutierrez, L., and Zhang, Y. (2021). On the controlling factors for globally extreme humid heat. Geophysical Research Letters. doi:10.1029/2021gl096082. [Twitter thread]
Raymond, C., Horton, R., Zscheischler, J., Martius, O., AghaKouchak, A., Balch, J., Bowen, S., Camargo, S., Hess, J., Kornhuber, K., Oppenheimer, M., Ruane, A., Wahl, T., and White, K. (2020). Understanding and managing connected extreme events. Nature Climate Change. doi:10.1038/s41558-020-0790-4.
-News coverage from Columbia University, CBS News
Raymond, C., Matthews, T., and Horton, R. (2020). The emergence of heat and humidity too severe for human tolerance. Science Advances. doi:10.1126/sciadv.aaw1838.
-News coverage from Science, Scientific American, AAAS, Bloomberg, Climate Central, CNN, Columbia Magazine, Columbia University, NBC News, New Scientist, Newsweek, NOAA, Quartz, The Economist, The Guardian, The National (UAE), Washington Post, Weather.com, Wunderground
-Also see our article in The Conversation
Raymond, C., and Mankin, J. (2019). Assessing present and future coastal moderation of extreme heat in the Eastern United States. Environmental Research Letters. doi:10.1088/1748-9326/ab495d.
Raymond, C., Singh, D., and Horton, R. (2017). Spatiotemporal patterns and synoptics of extreme wet-bulb temperature in the contiguous United States. Journal of Geophysical Research: Atmospheres. doi:10.1002/2017jd027140.
Professional Service and Activities
-Co-lead of the Risk KAN Compound Events working group; have been organizing regular webinars and other networking activities since April 2020.
-Co-lead organizer of the Aspen Global Change Institute "Workshop on Compounding, Cascading, and Cumulative Risks: Research-to-Practice Storylines", a ~30-person event in Jun 2026. More info available on the website.
-Co-lead organizer of the NSF-funded "Workshop on Compounding, Cascading, and Critical Risks to U.S. Infrastructure and Security", a ~100-person event in Aug 2025. More info available on the website.
-Co-lead organizer of the NSF-funded "Workshop on Correlated Extremes", a ~175-person event in May 2019. More info available on the website. Recordings of all talks are available on Youtube.
-Other workshop/conference organization and chairing:
3rd International Conference on Natural Hazards and Risks in a Changing World, 2024
2nd Como Training School on Compound Events, 2022
Workshop on Compound Weather and Climate Events, January 2021
AGU Fall Meeting sessions, 2019-25
EGU General Assembly sessions, 2019 & 2022
-Other activities:
NCAR Climate Data Guide Board of Advisors (2020-26)
NCAR Advanced Study Program Summer Colloquium (2026)
-Co-lead organizer of the Aspen Global Change Institute "Workshop on Compounding, Cascading, and Cumulative Risks: Research-to-Practice Storylines", a ~30-person event in Jun 2026. More info available on the website.
-Co-lead organizer of the NSF-funded "Workshop on Compounding, Cascading, and Critical Risks to U.S. Infrastructure and Security", a ~100-person event in Aug 2025. More info available on the website.
-Co-lead organizer of the NSF-funded "Workshop on Correlated Extremes", a ~175-person event in May 2019. More info available on the website. Recordings of all talks are available on Youtube.
-Other workshop/conference organization and chairing:
3rd International Conference on Natural Hazards and Risks in a Changing World, 2024
2nd Como Training School on Compound Events, 2022
Workshop on Compound Weather and Climate Events, January 2021
AGU Fall Meeting sessions, 2019-25
EGU General Assembly sessions, 2019 & 2022
-Other activities:
NCAR Climate Data Guide Board of Advisors (2020-26)
NCAR Advanced Study Program Summer Colloquium (2026)
Outreach and Mentorship
Ph.D. students
Daniel Bose, Montana State University — advisory committee (2025-27)
Kelley De Polt, Vrije Universiteit Amsterdam — examination committee (2026)
Undergraduate students
Anneliese Phillips & Jason Ge, JIFRESSE Summer Internship Program — lead mentor (2024, 2025)
Carolina Lopez, Caltech Summer Undergraduate Research Fellowship — lead mentor (2024)
Daniel Bose, Montana State University — advisory committee (2025-27)
Kelley De Polt, Vrije Universiteit Amsterdam — examination committee (2026)
Undergraduate students
Anneliese Phillips & Jason Ge, JIFRESSE Summer Internship Program — lead mentor (2024, 2025)
Carolina Lopez, Caltech Summer Undergraduate Research Fellowship — lead mentor (2024)