Merge pull request #77 from tsdataclinic/kaushik12-patch-1

Update README.md with First Street disclaimer

Author: kaushik12

README.md

@@ -58,6 +58,7 @@ All data accessed as of June 26th, 2023.
 - Flood Risk Factor from [First Street Climate-Adjusted Flood Risk - US Aggregate Data](https://aws.amazon.com/marketplace/pp/prodview-r36lzzzjacd32?sr=0-1&ref_=beagle&applicationId=AWSMPContessa#overview) by [First Street Foundation](https://firststreet.org/), [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
 - Heat Risk Factor from [First Street Climate-Adjusted Heat Risk - US Aggregate Data](https://aws.amazon.com/marketplace/pp/prodview-juylajmn3mixo?sr=0-1&ref_=beagle&applicationId=AWSMPContessa#overview) by [First Street Foundation](https://firststreet.org/), [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
 - Fire Risk Factor from [First Street Climate-Adjusted Wildfire Risk - US Aggregate Data](https://aws.amazon.com/marketplace/pp/prodview-crz65ioiwanoc?sr=0-1&ref_=beagle&applicationId=AWSMPContessa#overview) by [First Street Foundation](https://firststreet.org/), [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
+These climate risk factors are based on models developed by First Street in 2023. For information on the accessing the latest risk model data, visit the [First Street website](https://firststreet.org/). Please note that as of early 2024, these datasets are no longer available at a free tier.
 - Employee location data from [LEHD Origin-Destination Employment Statistics](https://lehd.ces.census.gov/data/) by [US Census Bureau](https://www.census.gov/)
 - Social vulnerability data from [CDC/ATSDR Social Vulnerability Index](https://www.atsdr.cdc.gov/placeandhealth/svi/data_documentation_download.html) by [Centers for Disease Control and Prevention Agency for Toxic Substances and Disease Registry](https://www.atsdr.cdc.gov/) 
 - Street networks retrieved using [OSMnx](https://github.com/gboeing/osmnx) with data by [OpenStreetMap](https://www.openstreetmap.org/about),  [Open Database License, "ODbL" 1.0](http://www.opendatacommons.org/licenses/odbl/)