SACRAMENTO, Calif. (AP) — California’s drought is providing an opportunity to the two Republicans vying to challenge Gov. Jerry Brown’s expected re-election campaign this fall, highlighting what they say are government failures to prepare the state for a foreseeable crisis.

The drought emergency Brown declared last month has added to the pressure on the Democratic governor to address longstanding problems with the state’s water storage and delivery systems. Brown has proposed a $25 billion plan to build two massive tunnels to ship water from the Sacramento-San Joaquin River delta to farms and communities.