Guides

• How DroughtOdds counts a drought year — The two rules behind every county figure: when a week counts as drought, and when 13 of them make a drought year.
• The worst drought years since 2000, county by county — Which years put the most US counties in a season-long drought, from 3,222 county records.
• When drought is the normal year: shrinking the lawn — 1,342 counties spend so many years in drought that a full lawn is a losing fight. What to replace it with and in what order.
• Changing the grass: when a drought-tolerant lawn is the answer — 933 counties get a real drought often enough to kill a thirsty lawn every few summers. Which grass types cope, and when to reseed.
• Where a regular lawn is fine, and the one thing still worth doing — 947 counties rarely see a season-long drought. A regular lawn works; a smarter controller covers the odd dry year.
• Is my county getting drier? Reading the last ten years — Comparing each county's last ten years with the ones before: 414 came out drier, 577 wetter.