Table 2 – Heat exposure levels in counties with most crop workers.

Present-day observed and projected future 95^th-percentile of summertime (MJJAS) daily maximum Heat Index (°F) and number of days above baseline TLV (83.4 °F; see Methods) in the twenty counties with the highest number of crop workers (Fig. 1). Colors indicate the OSHA risk levels of moderate (yellow), high (orange), and very high/extreme (red).

county	# of workers	95th-percentile MJJAS HImax			days/year above TLV
		present	+2°C	+4°C	present	+2°C	+4°C
Kern, California	65492	98.5	102.5	106.3	24	55	90
Monterey, California	64796	89.9	93.7	97.6	0	2	14
Fresno, California	54804	93.6	97.8	101.9	2	13	45
Tulare, California	37956	91.4	95.5	99.5	0	8	37
Yakima, Washington	37761	83.8	89.4	95.2	0	1	8
Ventura, California	29196	90.3	94.4	98.5	0	3	17
Santa Barbara, California	23304	86.5	90.0	94.0	0	0	5
San Joaquin, California	21399	101.7	106.2	110.3	6	23	59
Riverside, California	15707	100.1	105.2	110.6	42	77	105
Chelan, Washington	14849	78.1	83.2	89.0	0	0	1
Merced, California	13011	103.1	107.2	110.9	20	54	90
Stanislaus, California	12580	101.7	106.1	110.1	15	45	80
Santa Cruz, California	12538	89.2	93.3	97.6	0	0	3
Grant, Washington	12398	92.1	98.2	104.4	4	20	48
Marion, Oregon	12092	82.7	89.0	96.9	0	0	4
Madera, California	12058	93.5	98.2	102.5	2	11	43
Imperial, California	11505	109.2	115.3	122.0	105	124	136
Okanogan, Washington	9761	79.3	84.8	90.9	0	0	3
Hillsborough, Florida	9644	103.6	112.7	123.1	113	137	148
Benton, Washington	8867	95.4	101.5	107.3	9	31	61